1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.24" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 65 #include <linux/nvram.h> 66 #include <linux/proc_fs.h> 67 #include <linux/seq_file.h> 68 #include <linux/sysfs.h> 69 #include <linux/backlight.h> 70 #include <linux/fb.h> 71 #include <linux/platform_device.h> 72 #include <linux/hwmon.h> 73 #include <linux/hwmon-sysfs.h> 74 #include <linux/input.h> 75 #include <linux/leds.h> 76 #include <linux/rfkill.h> 77 #include <asm/uaccess.h> 78 79 #include <linux/dmi.h> 80 #include <linux/jiffies.h> 81 #include <linux/workqueue.h> 82 83 #include <sound/core.h> 84 #include <sound/control.h> 85 #include <sound/initval.h> 86 87 #include <acpi/acpi_drivers.h> 88 89 #include <linux/pci_ids.h> 90 91 92 /* ThinkPad CMOS commands */ 93 #define TP_CMOS_VOLUME_DOWN 0 94 #define TP_CMOS_VOLUME_UP 1 95 #define TP_CMOS_VOLUME_MUTE 2 96 #define TP_CMOS_BRIGHTNESS_UP 4 97 #define TP_CMOS_BRIGHTNESS_DOWN 5 98 #define TP_CMOS_THINKLIGHT_ON 12 99 #define TP_CMOS_THINKLIGHT_OFF 13 100 101 /* NVRAM Addresses */ 102 enum tp_nvram_addr { 103 TP_NVRAM_ADDR_HK2 = 0x57, 104 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 105 TP_NVRAM_ADDR_VIDEO = 0x59, 106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 107 TP_NVRAM_ADDR_MIXER = 0x60, 108 }; 109 110 /* NVRAM bit masks */ 111 enum { 112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 113 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 116 TP_NVRAM_MASK_THINKLIGHT = 0x10, 117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 121 TP_NVRAM_MASK_MUTE = 0x40, 122 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 124 TP_NVRAM_POS_LEVEL_VOLUME = 0, 125 }; 126 127 /* Misc NVRAM-related */ 128 enum { 129 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 130 }; 131 132 /* ACPI HIDs */ 133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 135 #define TPACPI_ACPI_EC_HID "PNP0C09" 136 137 /* Input IDs */ 138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 139 #define TPACPI_HKEY_INPUT_VERSION 0x4101 140 141 /* ACPI \WGSV commands */ 142 enum { 143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 147 }; 148 149 /* TP_ACPI_WGSV_GET_STATE bits */ 150 enum { 151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 161 }; 162 163 /* HKEY events */ 164 enum tpacpi_hkey_event_t { 165 /* Hotkey-related */ 166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 172 173 /* Reasons for waking up from S3/S4 */ 174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 180 181 /* Auto-sleep after eject request */ 182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 184 185 /* Misc bay events */ 186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 188 or port replicator */ 189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 190 dock or port replicator */ 191 192 /* User-interface events */ 193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 200 201 /* Key-related user-interface events */ 202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 204 205 /* Thermal events */ 206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 211 212 /* AC-related events */ 213 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 214 215 /* Misc */ 216 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 217 }; 218 219 /**************************************************************************** 220 * Main driver 221 */ 222 223 #define TPACPI_NAME "thinkpad" 224 #define TPACPI_DESC "ThinkPad ACPI Extras" 225 #define TPACPI_FILE TPACPI_NAME "_acpi" 226 #define TPACPI_URL "http://ibm-acpi.sf.net/" 227 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 228 229 #define TPACPI_PROC_DIR "ibm" 230 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 231 #define TPACPI_DRVR_NAME TPACPI_FILE 232 #define TPACPI_DRVR_SHORTNAME "tpacpi" 233 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 234 235 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 236 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 237 238 #define TPACPI_MAX_ACPI_ARGS 3 239 240 /* Debugging printk groups */ 241 #define TPACPI_DBG_ALL 0xffff 242 #define TPACPI_DBG_DISCLOSETASK 0x8000 243 #define TPACPI_DBG_INIT 0x0001 244 #define TPACPI_DBG_EXIT 0x0002 245 #define TPACPI_DBG_RFKILL 0x0004 246 #define TPACPI_DBG_HKEY 0x0008 247 #define TPACPI_DBG_FAN 0x0010 248 #define TPACPI_DBG_BRGHT 0x0020 249 #define TPACPI_DBG_MIXER 0x0040 250 251 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 252 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 253 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 254 255 256 /**************************************************************************** 257 * Driver-wide structs and misc. variables 258 */ 259 260 struct ibm_struct; 261 262 struct tp_acpi_drv_struct { 263 const struct acpi_device_id *hid; 264 struct acpi_driver *driver; 265 266 void (*notify) (struct ibm_struct *, u32); 267 acpi_handle *handle; 268 u32 type; 269 struct acpi_device *device; 270 }; 271 272 struct ibm_struct { 273 char *name; 274 275 int (*read) (struct seq_file *); 276 int (*write) (char *); 277 void (*exit) (void); 278 void (*resume) (void); 279 void (*suspend) (void); 280 void (*shutdown) (void); 281 282 struct list_head all_drivers; 283 284 struct tp_acpi_drv_struct *acpi; 285 286 struct { 287 u8 acpi_driver_registered:1; 288 u8 acpi_notify_installed:1; 289 u8 proc_created:1; 290 u8 init_called:1; 291 u8 experimental:1; 292 } flags; 293 }; 294 295 struct ibm_init_struct { 296 char param[32]; 297 298 int (*init) (struct ibm_init_struct *); 299 umode_t base_procfs_mode; 300 struct ibm_struct *data; 301 }; 302 303 static struct { 304 u32 bluetooth:1; 305 u32 hotkey:1; 306 u32 hotkey_mask:1; 307 u32 hotkey_wlsw:1; 308 u32 hotkey_tablet:1; 309 u32 light:1; 310 u32 light_status:1; 311 u32 bright_acpimode:1; 312 u32 bright_unkfw:1; 313 u32 wan:1; 314 u32 uwb:1; 315 u32 fan_ctrl_status_undef:1; 316 u32 second_fan:1; 317 u32 beep_needs_two_args:1; 318 u32 mixer_no_level_control:1; 319 u32 input_device_registered:1; 320 u32 platform_drv_registered:1; 321 u32 platform_drv_attrs_registered:1; 322 u32 sensors_pdrv_registered:1; 323 u32 sensors_pdrv_attrs_registered:1; 324 u32 sensors_pdev_attrs_registered:1; 325 u32 hotkey_poll_active:1; 326 } tp_features; 327 328 static struct { 329 u16 hotkey_mask_ff:1; 330 u16 volume_ctrl_forbidden:1; 331 } tp_warned; 332 333 struct thinkpad_id_data { 334 unsigned int vendor; /* ThinkPad vendor: 335 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 336 337 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 338 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 339 340 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 341 u16 ec_model; 342 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 343 u16 ec_release; 344 345 char *model_str; /* ThinkPad T43 */ 346 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 347 }; 348 static struct thinkpad_id_data thinkpad_id; 349 350 static enum { 351 TPACPI_LIFE_INIT = 0, 352 TPACPI_LIFE_RUNNING, 353 TPACPI_LIFE_EXITING, 354 } tpacpi_lifecycle; 355 356 static int experimental; 357 static u32 dbg_level; 358 359 static struct workqueue_struct *tpacpi_wq; 360 361 enum led_status_t { 362 TPACPI_LED_OFF = 0, 363 TPACPI_LED_ON, 364 TPACPI_LED_BLINK, 365 }; 366 367 /* Special LED class that can defer work */ 368 struct tpacpi_led_classdev { 369 struct led_classdev led_classdev; 370 struct work_struct work; 371 enum led_status_t new_state; 372 unsigned int led; 373 }; 374 375 /* brightness level capabilities */ 376 static unsigned int bright_maxlvl; /* 0 = unknown */ 377 378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 379 static int dbg_wlswemul; 380 static bool tpacpi_wlsw_emulstate; 381 static int dbg_bluetoothemul; 382 static bool tpacpi_bluetooth_emulstate; 383 static int dbg_wwanemul; 384 static bool tpacpi_wwan_emulstate; 385 static int dbg_uwbemul; 386 static bool tpacpi_uwb_emulstate; 387 #endif 388 389 390 /************************************************************************* 391 * Debugging helpers 392 */ 393 394 #define dbg_printk(a_dbg_level, format, arg...) \ 395 do { \ 396 if (dbg_level & (a_dbg_level)) \ 397 printk(KERN_DEBUG pr_fmt("%s: " format), \ 398 __func__, ##arg); \ 399 } while (0) 400 401 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 402 #define vdbg_printk dbg_printk 403 static const char *str_supported(int is_supported); 404 #else 405 static inline const char *str_supported(int is_supported) { return ""; } 406 #define vdbg_printk(a_dbg_level, format, arg...) \ 407 no_printk(format, ##arg) 408 #endif 409 410 static void tpacpi_log_usertask(const char * const what) 411 { 412 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 413 what, task_tgid_vnr(current)); 414 } 415 416 #define tpacpi_disclose_usertask(what, format, arg...) \ 417 do { \ 418 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 419 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 420 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 421 what, task_tgid_vnr(current), ## arg); \ 422 } \ 423 } while (0) 424 425 /* 426 * Quirk handling helpers 427 * 428 * ThinkPad IDs and versions seen in the field so far 429 * are two-characters from the set [0-9A-Z], i.e. base 36. 430 * 431 * We use values well outside that range as specials. 432 */ 433 434 #define TPACPI_MATCH_ANY 0xffffU 435 #define TPACPI_MATCH_UNKNOWN 0U 436 437 /* TPID('1', 'Y') == 0x5931 */ 438 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 439 440 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 441 { .vendor = PCI_VENDOR_ID_IBM, \ 442 .bios = TPID(__id1, __id2), \ 443 .ec = TPACPI_MATCH_ANY, \ 444 .quirks = (__quirk) } 445 446 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 447 { .vendor = PCI_VENDOR_ID_LENOVO, \ 448 .bios = TPID(__id1, __id2), \ 449 .ec = TPACPI_MATCH_ANY, \ 450 .quirks = (__quirk) } 451 452 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 453 { .vendor = PCI_VENDOR_ID_LENOVO, \ 454 .bios = TPACPI_MATCH_ANY, \ 455 .ec = TPID(__id1, __id2), \ 456 .quirks = (__quirk) } 457 458 struct tpacpi_quirk { 459 unsigned int vendor; 460 u16 bios; 461 u16 ec; 462 unsigned long quirks; 463 }; 464 465 /** 466 * tpacpi_check_quirks() - search BIOS/EC version on a list 467 * @qlist: array of &struct tpacpi_quirk 468 * @qlist_size: number of elements in @qlist 469 * 470 * Iterates over a quirks list until one is found that matches the 471 * ThinkPad's vendor, BIOS and EC model. 472 * 473 * Returns 0 if nothing matches, otherwise returns the quirks field of 474 * the matching &struct tpacpi_quirk entry. 475 * 476 * The match criteria is: vendor, ec and bios much match. 477 */ 478 static unsigned long __init tpacpi_check_quirks( 479 const struct tpacpi_quirk *qlist, 480 unsigned int qlist_size) 481 { 482 while (qlist_size) { 483 if ((qlist->vendor == thinkpad_id.vendor || 484 qlist->vendor == TPACPI_MATCH_ANY) && 485 (qlist->bios == thinkpad_id.bios_model || 486 qlist->bios == TPACPI_MATCH_ANY) && 487 (qlist->ec == thinkpad_id.ec_model || 488 qlist->ec == TPACPI_MATCH_ANY)) 489 return qlist->quirks; 490 491 qlist_size--; 492 qlist++; 493 } 494 return 0; 495 } 496 497 static inline bool __pure __init tpacpi_is_lenovo(void) 498 { 499 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 500 } 501 502 static inline bool __pure __init tpacpi_is_ibm(void) 503 { 504 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 505 } 506 507 /**************************************************************************** 508 **************************************************************************** 509 * 510 * ACPI Helpers and device model 511 * 512 **************************************************************************** 513 ****************************************************************************/ 514 515 /************************************************************************* 516 * ACPI basic handles 517 */ 518 519 static acpi_handle root_handle; 520 static acpi_handle ec_handle; 521 522 #define TPACPI_HANDLE(object, parent, paths...) \ 523 static acpi_handle object##_handle; \ 524 static const acpi_handle * const object##_parent __initconst = \ 525 &parent##_handle; \ 526 static char *object##_paths[] __initdata = { paths } 527 528 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 529 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 530 531 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 532 /* T4x, X31, X40 */ 533 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 534 "\\CMS", /* R40, R40e */ 535 ); /* all others */ 536 537 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 538 "^HKEY", /* R30, R31 */ 539 "HKEY", /* all others */ 540 ); /* 570 */ 541 542 /************************************************************************* 543 * ACPI helpers 544 */ 545 546 static int acpi_evalf(acpi_handle handle, 547 int *res, char *method, char *fmt, ...) 548 { 549 char *fmt0 = fmt; 550 struct acpi_object_list params; 551 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 552 struct acpi_buffer result, *resultp; 553 union acpi_object out_obj; 554 acpi_status status; 555 va_list ap; 556 char res_type; 557 int success; 558 int quiet; 559 560 if (!*fmt) { 561 pr_err("acpi_evalf() called with empty format\n"); 562 return 0; 563 } 564 565 if (*fmt == 'q') { 566 quiet = 1; 567 fmt++; 568 } else 569 quiet = 0; 570 571 res_type = *(fmt++); 572 573 params.count = 0; 574 params.pointer = &in_objs[0]; 575 576 va_start(ap, fmt); 577 while (*fmt) { 578 char c = *(fmt++); 579 switch (c) { 580 case 'd': /* int */ 581 in_objs[params.count].integer.value = va_arg(ap, int); 582 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 583 break; 584 /* add more types as needed */ 585 default: 586 pr_err("acpi_evalf() called " 587 "with invalid format character '%c'\n", c); 588 va_end(ap); 589 return 0; 590 } 591 } 592 va_end(ap); 593 594 if (res_type != 'v') { 595 result.length = sizeof(out_obj); 596 result.pointer = &out_obj; 597 resultp = &result; 598 } else 599 resultp = NULL; 600 601 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 602 603 switch (res_type) { 604 case 'd': /* int */ 605 success = (status == AE_OK && 606 out_obj.type == ACPI_TYPE_INTEGER); 607 if (success && res) 608 *res = out_obj.integer.value; 609 break; 610 case 'v': /* void */ 611 success = status == AE_OK; 612 break; 613 /* add more types as needed */ 614 default: 615 pr_err("acpi_evalf() called " 616 "with invalid format character '%c'\n", res_type); 617 return 0; 618 } 619 620 if (!success && !quiet) 621 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 622 method, fmt0, acpi_format_exception(status)); 623 624 return success; 625 } 626 627 static int acpi_ec_read(int i, u8 *p) 628 { 629 int v; 630 631 if (ecrd_handle) { 632 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 633 return 0; 634 *p = v; 635 } else { 636 if (ec_read(i, p) < 0) 637 return 0; 638 } 639 640 return 1; 641 } 642 643 static int acpi_ec_write(int i, u8 v) 644 { 645 if (ecwr_handle) { 646 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 647 return 0; 648 } else { 649 if (ec_write(i, v) < 0) 650 return 0; 651 } 652 653 return 1; 654 } 655 656 static int issue_thinkpad_cmos_command(int cmos_cmd) 657 { 658 if (!cmos_handle) 659 return -ENXIO; 660 661 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 662 return -EIO; 663 664 return 0; 665 } 666 667 /************************************************************************* 668 * ACPI device model 669 */ 670 671 #define TPACPI_ACPIHANDLE_INIT(object) \ 672 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 673 object##_paths, ARRAY_SIZE(object##_paths)) 674 675 static void __init drv_acpi_handle_init(const char *name, 676 acpi_handle *handle, const acpi_handle parent, 677 char **paths, const int num_paths) 678 { 679 int i; 680 acpi_status status; 681 682 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 683 name); 684 685 for (i = 0; i < num_paths; i++) { 686 status = acpi_get_handle(parent, paths[i], handle); 687 if (ACPI_SUCCESS(status)) { 688 dbg_printk(TPACPI_DBG_INIT, 689 "Found ACPI handle %s for %s\n", 690 paths[i], name); 691 return; 692 } 693 } 694 695 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 696 name); 697 *handle = NULL; 698 } 699 700 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 701 u32 level, void *context, void **return_value) 702 { 703 *(acpi_handle *)return_value = handle; 704 705 return AE_CTRL_TERMINATE; 706 } 707 708 static void __init tpacpi_acpi_handle_locate(const char *name, 709 const char *hid, 710 acpi_handle *handle) 711 { 712 acpi_status status; 713 acpi_handle device_found; 714 715 BUG_ON(!name || !hid || !handle); 716 vdbg_printk(TPACPI_DBG_INIT, 717 "trying to locate ACPI handle for %s, using HID %s\n", 718 name, hid); 719 720 memset(&device_found, 0, sizeof(device_found)); 721 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 722 (void *)name, &device_found); 723 724 *handle = NULL; 725 726 if (ACPI_SUCCESS(status)) { 727 *handle = device_found; 728 dbg_printk(TPACPI_DBG_INIT, 729 "Found ACPI handle for %s\n", name); 730 } else { 731 vdbg_printk(TPACPI_DBG_INIT, 732 "Could not locate an ACPI handle for %s: %s\n", 733 name, acpi_format_exception(status)); 734 } 735 } 736 737 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 738 { 739 struct ibm_struct *ibm = data; 740 741 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 742 return; 743 744 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 745 return; 746 747 ibm->acpi->notify(ibm, event); 748 } 749 750 static int __init setup_acpi_notify(struct ibm_struct *ibm) 751 { 752 acpi_status status; 753 int rc; 754 755 BUG_ON(!ibm->acpi); 756 757 if (!*ibm->acpi->handle) 758 return 0; 759 760 vdbg_printk(TPACPI_DBG_INIT, 761 "setting up ACPI notify for %s\n", ibm->name); 762 763 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 764 if (rc < 0) { 765 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 766 return -ENODEV; 767 } 768 769 ibm->acpi->device->driver_data = ibm; 770 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 771 TPACPI_ACPI_EVENT_PREFIX, 772 ibm->name); 773 774 status = acpi_install_notify_handler(*ibm->acpi->handle, 775 ibm->acpi->type, dispatch_acpi_notify, ibm); 776 if (ACPI_FAILURE(status)) { 777 if (status == AE_ALREADY_EXISTS) { 778 pr_notice("another device driver is already " 779 "handling %s events\n", ibm->name); 780 } else { 781 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 782 ibm->name, acpi_format_exception(status)); 783 } 784 return -ENODEV; 785 } 786 ibm->flags.acpi_notify_installed = 1; 787 return 0; 788 } 789 790 static int __init tpacpi_device_add(struct acpi_device *device) 791 { 792 return 0; 793 } 794 795 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 796 { 797 int rc; 798 799 dbg_printk(TPACPI_DBG_INIT, 800 "registering %s as an ACPI driver\n", ibm->name); 801 802 BUG_ON(!ibm->acpi); 803 804 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 805 if (!ibm->acpi->driver) { 806 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 807 return -ENOMEM; 808 } 809 810 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 811 ibm->acpi->driver->ids = ibm->acpi->hid; 812 813 ibm->acpi->driver->ops.add = &tpacpi_device_add; 814 815 rc = acpi_bus_register_driver(ibm->acpi->driver); 816 if (rc < 0) { 817 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 818 ibm->name, rc); 819 kfree(ibm->acpi->driver); 820 ibm->acpi->driver = NULL; 821 } else if (!rc) 822 ibm->flags.acpi_driver_registered = 1; 823 824 return rc; 825 } 826 827 828 /**************************************************************************** 829 **************************************************************************** 830 * 831 * Procfs Helpers 832 * 833 **************************************************************************** 834 ****************************************************************************/ 835 836 static int dispatch_proc_show(struct seq_file *m, void *v) 837 { 838 struct ibm_struct *ibm = m->private; 839 840 if (!ibm || !ibm->read) 841 return -EINVAL; 842 return ibm->read(m); 843 } 844 845 static int dispatch_proc_open(struct inode *inode, struct file *file) 846 { 847 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 848 } 849 850 static ssize_t dispatch_proc_write(struct file *file, 851 const char __user *userbuf, 852 size_t count, loff_t *pos) 853 { 854 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 855 char *kernbuf; 856 int ret; 857 858 if (!ibm || !ibm->write) 859 return -EINVAL; 860 if (count > PAGE_SIZE - 2) 861 return -EINVAL; 862 863 kernbuf = kmalloc(count + 2, GFP_KERNEL); 864 if (!kernbuf) 865 return -ENOMEM; 866 867 if (copy_from_user(kernbuf, userbuf, count)) { 868 kfree(kernbuf); 869 return -EFAULT; 870 } 871 872 kernbuf[count] = 0; 873 strcat(kernbuf, ","); 874 ret = ibm->write(kernbuf); 875 if (ret == 0) 876 ret = count; 877 878 kfree(kernbuf); 879 880 return ret; 881 } 882 883 static const struct file_operations dispatch_proc_fops = { 884 .owner = THIS_MODULE, 885 .open = dispatch_proc_open, 886 .read = seq_read, 887 .llseek = seq_lseek, 888 .release = single_release, 889 .write = dispatch_proc_write, 890 }; 891 892 static char *next_cmd(char **cmds) 893 { 894 char *start = *cmds; 895 char *end; 896 897 while ((end = strchr(start, ',')) && end == start) 898 start = end + 1; 899 900 if (!end) 901 return NULL; 902 903 *end = 0; 904 *cmds = end + 1; 905 return start; 906 } 907 908 909 /**************************************************************************** 910 **************************************************************************** 911 * 912 * Device model: input, hwmon and platform 913 * 914 **************************************************************************** 915 ****************************************************************************/ 916 917 static struct platform_device *tpacpi_pdev; 918 static struct platform_device *tpacpi_sensors_pdev; 919 static struct device *tpacpi_hwmon; 920 static struct input_dev *tpacpi_inputdev; 921 static struct mutex tpacpi_inputdev_send_mutex; 922 static LIST_HEAD(tpacpi_all_drivers); 923 924 #ifdef CONFIG_PM_SLEEP 925 static int tpacpi_suspend_handler(struct device *dev) 926 { 927 struct ibm_struct *ibm, *itmp; 928 929 list_for_each_entry_safe(ibm, itmp, 930 &tpacpi_all_drivers, 931 all_drivers) { 932 if (ibm->suspend) 933 (ibm->suspend)(); 934 } 935 936 return 0; 937 } 938 939 static int tpacpi_resume_handler(struct device *dev) 940 { 941 struct ibm_struct *ibm, *itmp; 942 943 list_for_each_entry_safe(ibm, itmp, 944 &tpacpi_all_drivers, 945 all_drivers) { 946 if (ibm->resume) 947 (ibm->resume)(); 948 } 949 950 return 0; 951 } 952 #endif 953 954 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 955 tpacpi_suspend_handler, tpacpi_resume_handler); 956 957 static void tpacpi_shutdown_handler(struct platform_device *pdev) 958 { 959 struct ibm_struct *ibm, *itmp; 960 961 list_for_each_entry_safe(ibm, itmp, 962 &tpacpi_all_drivers, 963 all_drivers) { 964 if (ibm->shutdown) 965 (ibm->shutdown)(); 966 } 967 } 968 969 static struct platform_driver tpacpi_pdriver = { 970 .driver = { 971 .name = TPACPI_DRVR_NAME, 972 .owner = THIS_MODULE, 973 .pm = &tpacpi_pm, 974 }, 975 .shutdown = tpacpi_shutdown_handler, 976 }; 977 978 static struct platform_driver tpacpi_hwmon_pdriver = { 979 .driver = { 980 .name = TPACPI_HWMON_DRVR_NAME, 981 .owner = THIS_MODULE, 982 }, 983 }; 984 985 /************************************************************************* 986 * sysfs support helpers 987 */ 988 989 struct attribute_set { 990 unsigned int members, max_members; 991 struct attribute_group group; 992 }; 993 994 struct attribute_set_obj { 995 struct attribute_set s; 996 struct attribute *a; 997 } __attribute__((packed)); 998 999 static struct attribute_set *create_attr_set(unsigned int max_members, 1000 const char *name) 1001 { 1002 struct attribute_set_obj *sobj; 1003 1004 if (max_members == 0) 1005 return NULL; 1006 1007 /* Allocates space for implicit NULL at the end too */ 1008 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1009 max_members * sizeof(struct attribute *), 1010 GFP_KERNEL); 1011 if (!sobj) 1012 return NULL; 1013 sobj->s.max_members = max_members; 1014 sobj->s.group.attrs = &sobj->a; 1015 sobj->s.group.name = name; 1016 1017 return &sobj->s; 1018 } 1019 1020 #define destroy_attr_set(_set) \ 1021 kfree(_set); 1022 1023 /* not multi-threaded safe, use it in a single thread per set */ 1024 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1025 { 1026 if (!s || !attr) 1027 return -EINVAL; 1028 1029 if (s->members >= s->max_members) 1030 return -ENOMEM; 1031 1032 s->group.attrs[s->members] = attr; 1033 s->members++; 1034 1035 return 0; 1036 } 1037 1038 static int add_many_to_attr_set(struct attribute_set *s, 1039 struct attribute **attr, 1040 unsigned int count) 1041 { 1042 int i, res; 1043 1044 for (i = 0; i < count; i++) { 1045 res = add_to_attr_set(s, attr[i]); 1046 if (res) 1047 return res; 1048 } 1049 1050 return 0; 1051 } 1052 1053 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1054 { 1055 sysfs_remove_group(kobj, &s->group); 1056 destroy_attr_set(s); 1057 } 1058 1059 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1060 sysfs_create_group(_kobj, &_attr_set->group) 1061 1062 static int parse_strtoul(const char *buf, 1063 unsigned long max, unsigned long *value) 1064 { 1065 char *endp; 1066 1067 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1068 endp = skip_spaces(endp); 1069 if (*endp || *value > max) 1070 return -EINVAL; 1071 1072 return 0; 1073 } 1074 1075 static void tpacpi_disable_brightness_delay(void) 1076 { 1077 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1078 pr_notice("ACPI backlight control delay disabled\n"); 1079 } 1080 1081 static void printk_deprecated_attribute(const char * const what, 1082 const char * const details) 1083 { 1084 tpacpi_log_usertask("deprecated sysfs attribute"); 1085 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1086 "will be removed. %s\n", 1087 what, details); 1088 } 1089 1090 /************************************************************************* 1091 * rfkill and radio control support helpers 1092 */ 1093 1094 /* 1095 * ThinkPad-ACPI firmware handling model: 1096 * 1097 * WLSW (master wireless switch) is event-driven, and is common to all 1098 * firmware-controlled radios. It cannot be controlled, just monitored, 1099 * as expected. It overrides all radio state in firmware 1100 * 1101 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1102 * (TODO: verify how WLSW interacts with the returned radio state). 1103 * 1104 * The only time there are shadow radio state changes, is when 1105 * masked-off hotkeys are used. 1106 */ 1107 1108 /* 1109 * Internal driver API for radio state: 1110 * 1111 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1112 * bool: true means radio blocked (off) 1113 */ 1114 enum tpacpi_rfkill_state { 1115 TPACPI_RFK_RADIO_OFF = 0, 1116 TPACPI_RFK_RADIO_ON 1117 }; 1118 1119 /* rfkill switches */ 1120 enum tpacpi_rfk_id { 1121 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1122 TPACPI_RFK_WWAN_SW_ID, 1123 TPACPI_RFK_UWB_SW_ID, 1124 TPACPI_RFK_SW_MAX 1125 }; 1126 1127 static const char *tpacpi_rfkill_names[] = { 1128 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1129 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1130 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1131 [TPACPI_RFK_SW_MAX] = NULL 1132 }; 1133 1134 /* ThinkPad-ACPI rfkill subdriver */ 1135 struct tpacpi_rfk { 1136 struct rfkill *rfkill; 1137 enum tpacpi_rfk_id id; 1138 const struct tpacpi_rfk_ops *ops; 1139 }; 1140 1141 struct tpacpi_rfk_ops { 1142 /* firmware interface */ 1143 int (*get_status)(void); 1144 int (*set_status)(const enum tpacpi_rfkill_state); 1145 }; 1146 1147 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1148 1149 /* Query FW and update rfkill sw state for a given rfkill switch */ 1150 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1151 { 1152 int status; 1153 1154 if (!tp_rfk) 1155 return -ENODEV; 1156 1157 status = (tp_rfk->ops->get_status)(); 1158 if (status < 0) 1159 return status; 1160 1161 rfkill_set_sw_state(tp_rfk->rfkill, 1162 (status == TPACPI_RFK_RADIO_OFF)); 1163 1164 return status; 1165 } 1166 1167 /* Query FW and update rfkill sw state for all rfkill switches */ 1168 static void tpacpi_rfk_update_swstate_all(void) 1169 { 1170 unsigned int i; 1171 1172 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1173 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1174 } 1175 1176 /* 1177 * Sync the HW-blocking state of all rfkill switches, 1178 * do notice it causes the rfkill core to schedule uevents 1179 */ 1180 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1181 { 1182 unsigned int i; 1183 struct tpacpi_rfk *tp_rfk; 1184 1185 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1186 tp_rfk = tpacpi_rfkill_switches[i]; 1187 if (tp_rfk) { 1188 if (rfkill_set_hw_state(tp_rfk->rfkill, 1189 blocked)) { 1190 /* ignore -- we track sw block */ 1191 } 1192 } 1193 } 1194 } 1195 1196 /* Call to get the WLSW state from the firmware */ 1197 static int hotkey_get_wlsw(void); 1198 1199 /* Call to query WLSW state and update all rfkill switches */ 1200 static bool tpacpi_rfk_check_hwblock_state(void) 1201 { 1202 int res = hotkey_get_wlsw(); 1203 int hw_blocked; 1204 1205 /* When unknown or unsupported, we have to assume it is unblocked */ 1206 if (res < 0) 1207 return false; 1208 1209 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1210 tpacpi_rfk_update_hwblock_state(hw_blocked); 1211 1212 return hw_blocked; 1213 } 1214 1215 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1216 { 1217 struct tpacpi_rfk *tp_rfk = data; 1218 int res; 1219 1220 dbg_printk(TPACPI_DBG_RFKILL, 1221 "request to change radio state to %s\n", 1222 blocked ? "blocked" : "unblocked"); 1223 1224 /* try to set radio state */ 1225 res = (tp_rfk->ops->set_status)(blocked ? 1226 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1227 1228 /* and update the rfkill core with whatever the FW really did */ 1229 tpacpi_rfk_update_swstate(tp_rfk); 1230 1231 return (res < 0) ? res : 0; 1232 } 1233 1234 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1235 .set_block = tpacpi_rfk_hook_set_block, 1236 }; 1237 1238 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1239 const struct tpacpi_rfk_ops *tp_rfkops, 1240 const enum rfkill_type rfktype, 1241 const char *name, 1242 const bool set_default) 1243 { 1244 struct tpacpi_rfk *atp_rfk; 1245 int res; 1246 bool sw_state = false; 1247 bool hw_state; 1248 int sw_status; 1249 1250 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1251 1252 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1253 if (atp_rfk) 1254 atp_rfk->rfkill = rfkill_alloc(name, 1255 &tpacpi_pdev->dev, 1256 rfktype, 1257 &tpacpi_rfk_rfkill_ops, 1258 atp_rfk); 1259 if (!atp_rfk || !atp_rfk->rfkill) { 1260 pr_err("failed to allocate memory for rfkill class\n"); 1261 kfree(atp_rfk); 1262 return -ENOMEM; 1263 } 1264 1265 atp_rfk->id = id; 1266 atp_rfk->ops = tp_rfkops; 1267 1268 sw_status = (tp_rfkops->get_status)(); 1269 if (sw_status < 0) { 1270 pr_err("failed to read initial state for %s, error %d\n", 1271 name, sw_status); 1272 } else { 1273 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1274 if (set_default) { 1275 /* try to keep the initial state, since we ask the 1276 * firmware to preserve it across S5 in NVRAM */ 1277 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1278 } 1279 } 1280 hw_state = tpacpi_rfk_check_hwblock_state(); 1281 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1282 1283 res = rfkill_register(atp_rfk->rfkill); 1284 if (res < 0) { 1285 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1286 rfkill_destroy(atp_rfk->rfkill); 1287 kfree(atp_rfk); 1288 return res; 1289 } 1290 1291 tpacpi_rfkill_switches[id] = atp_rfk; 1292 1293 pr_info("rfkill switch %s: radio is %sblocked\n", 1294 name, (sw_state || hw_state) ? "" : "un"); 1295 return 0; 1296 } 1297 1298 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1299 { 1300 struct tpacpi_rfk *tp_rfk; 1301 1302 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1303 1304 tp_rfk = tpacpi_rfkill_switches[id]; 1305 if (tp_rfk) { 1306 rfkill_unregister(tp_rfk->rfkill); 1307 rfkill_destroy(tp_rfk->rfkill); 1308 tpacpi_rfkill_switches[id] = NULL; 1309 kfree(tp_rfk); 1310 } 1311 } 1312 1313 static void printk_deprecated_rfkill_attribute(const char * const what) 1314 { 1315 printk_deprecated_attribute(what, 1316 "Please switch to generic rfkill before year 2010"); 1317 } 1318 1319 /* sysfs <radio> enable ------------------------------------------------ */ 1320 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1321 struct device_attribute *attr, 1322 char *buf) 1323 { 1324 int status; 1325 1326 printk_deprecated_rfkill_attribute(attr->attr.name); 1327 1328 /* This is in the ABI... */ 1329 if (tpacpi_rfk_check_hwblock_state()) { 1330 status = TPACPI_RFK_RADIO_OFF; 1331 } else { 1332 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1333 if (status < 0) 1334 return status; 1335 } 1336 1337 return snprintf(buf, PAGE_SIZE, "%d\n", 1338 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1339 } 1340 1341 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1342 struct device_attribute *attr, 1343 const char *buf, size_t count) 1344 { 1345 unsigned long t; 1346 int res; 1347 1348 printk_deprecated_rfkill_attribute(attr->attr.name); 1349 1350 if (parse_strtoul(buf, 1, &t)) 1351 return -EINVAL; 1352 1353 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1354 1355 /* This is in the ABI... */ 1356 if (tpacpi_rfk_check_hwblock_state() && !!t) 1357 return -EPERM; 1358 1359 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1360 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1361 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1362 1363 return (res < 0) ? res : count; 1364 } 1365 1366 /* procfs -------------------------------------------------------------- */ 1367 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1368 { 1369 if (id >= TPACPI_RFK_SW_MAX) 1370 seq_printf(m, "status:\t\tnot supported\n"); 1371 else { 1372 int status; 1373 1374 /* This is in the ABI... */ 1375 if (tpacpi_rfk_check_hwblock_state()) { 1376 status = TPACPI_RFK_RADIO_OFF; 1377 } else { 1378 status = tpacpi_rfk_update_swstate( 1379 tpacpi_rfkill_switches[id]); 1380 if (status < 0) 1381 return status; 1382 } 1383 1384 seq_printf(m, "status:\t\t%s\n", 1385 (status == TPACPI_RFK_RADIO_ON) ? 1386 "enabled" : "disabled"); 1387 seq_printf(m, "commands:\tenable, disable\n"); 1388 } 1389 1390 return 0; 1391 } 1392 1393 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1394 { 1395 char *cmd; 1396 int status = -1; 1397 int res = 0; 1398 1399 if (id >= TPACPI_RFK_SW_MAX) 1400 return -ENODEV; 1401 1402 while ((cmd = next_cmd(&buf))) { 1403 if (strlencmp(cmd, "enable") == 0) 1404 status = TPACPI_RFK_RADIO_ON; 1405 else if (strlencmp(cmd, "disable") == 0) 1406 status = TPACPI_RFK_RADIO_OFF; 1407 else 1408 return -EINVAL; 1409 } 1410 1411 if (status != -1) { 1412 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1413 (status == TPACPI_RFK_RADIO_ON) ? 1414 "enable" : "disable", 1415 tpacpi_rfkill_names[id]); 1416 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1417 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1418 } 1419 1420 return res; 1421 } 1422 1423 /************************************************************************* 1424 * thinkpad-acpi driver attributes 1425 */ 1426 1427 /* interface_version --------------------------------------------------- */ 1428 static ssize_t tpacpi_driver_interface_version_show( 1429 struct device_driver *drv, 1430 char *buf) 1431 { 1432 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1433 } 1434 1435 static DRIVER_ATTR(interface_version, S_IRUGO, 1436 tpacpi_driver_interface_version_show, NULL); 1437 1438 /* debug_level --------------------------------------------------------- */ 1439 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1440 char *buf) 1441 { 1442 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1443 } 1444 1445 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1446 const char *buf, size_t count) 1447 { 1448 unsigned long t; 1449 1450 if (parse_strtoul(buf, 0xffff, &t)) 1451 return -EINVAL; 1452 1453 dbg_level = t; 1454 1455 return count; 1456 } 1457 1458 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1459 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1460 1461 /* version ------------------------------------------------------------- */ 1462 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1463 char *buf) 1464 { 1465 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1466 TPACPI_DESC, TPACPI_VERSION); 1467 } 1468 1469 static DRIVER_ATTR(version, S_IRUGO, 1470 tpacpi_driver_version_show, NULL); 1471 1472 /* --------------------------------------------------------------------- */ 1473 1474 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1475 1476 /* wlsw_emulstate ------------------------------------------------------ */ 1477 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1478 char *buf) 1479 { 1480 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1481 } 1482 1483 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1484 const char *buf, size_t count) 1485 { 1486 unsigned long t; 1487 1488 if (parse_strtoul(buf, 1, &t)) 1489 return -EINVAL; 1490 1491 if (tpacpi_wlsw_emulstate != !!t) { 1492 tpacpi_wlsw_emulstate = !!t; 1493 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1494 } 1495 1496 return count; 1497 } 1498 1499 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1500 tpacpi_driver_wlsw_emulstate_show, 1501 tpacpi_driver_wlsw_emulstate_store); 1502 1503 /* bluetooth_emulstate ------------------------------------------------- */ 1504 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1505 struct device_driver *drv, 1506 char *buf) 1507 { 1508 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1509 } 1510 1511 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1512 struct device_driver *drv, 1513 const char *buf, size_t count) 1514 { 1515 unsigned long t; 1516 1517 if (parse_strtoul(buf, 1, &t)) 1518 return -EINVAL; 1519 1520 tpacpi_bluetooth_emulstate = !!t; 1521 1522 return count; 1523 } 1524 1525 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1526 tpacpi_driver_bluetooth_emulstate_show, 1527 tpacpi_driver_bluetooth_emulstate_store); 1528 1529 /* wwan_emulstate ------------------------------------------------- */ 1530 static ssize_t tpacpi_driver_wwan_emulstate_show( 1531 struct device_driver *drv, 1532 char *buf) 1533 { 1534 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1535 } 1536 1537 static ssize_t tpacpi_driver_wwan_emulstate_store( 1538 struct device_driver *drv, 1539 const char *buf, size_t count) 1540 { 1541 unsigned long t; 1542 1543 if (parse_strtoul(buf, 1, &t)) 1544 return -EINVAL; 1545 1546 tpacpi_wwan_emulstate = !!t; 1547 1548 return count; 1549 } 1550 1551 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1552 tpacpi_driver_wwan_emulstate_show, 1553 tpacpi_driver_wwan_emulstate_store); 1554 1555 /* uwb_emulstate ------------------------------------------------- */ 1556 static ssize_t tpacpi_driver_uwb_emulstate_show( 1557 struct device_driver *drv, 1558 char *buf) 1559 { 1560 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1561 } 1562 1563 static ssize_t tpacpi_driver_uwb_emulstate_store( 1564 struct device_driver *drv, 1565 const char *buf, size_t count) 1566 { 1567 unsigned long t; 1568 1569 if (parse_strtoul(buf, 1, &t)) 1570 return -EINVAL; 1571 1572 tpacpi_uwb_emulstate = !!t; 1573 1574 return count; 1575 } 1576 1577 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1578 tpacpi_driver_uwb_emulstate_show, 1579 tpacpi_driver_uwb_emulstate_store); 1580 #endif 1581 1582 /* --------------------------------------------------------------------- */ 1583 1584 static struct driver_attribute *tpacpi_driver_attributes[] = { 1585 &driver_attr_debug_level, &driver_attr_version, 1586 &driver_attr_interface_version, 1587 }; 1588 1589 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1590 { 1591 int i, res; 1592 1593 i = 0; 1594 res = 0; 1595 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1596 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1597 i++; 1598 } 1599 1600 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1601 if (!res && dbg_wlswemul) 1602 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1603 if (!res && dbg_bluetoothemul) 1604 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1605 if (!res && dbg_wwanemul) 1606 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1607 if (!res && dbg_uwbemul) 1608 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1609 #endif 1610 1611 return res; 1612 } 1613 1614 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1615 { 1616 int i; 1617 1618 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1619 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1620 1621 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1622 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1623 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1624 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1625 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1626 #endif 1627 } 1628 1629 /************************************************************************* 1630 * Firmware Data 1631 */ 1632 1633 /* 1634 * Table of recommended minimum BIOS versions 1635 * 1636 * Reasons for listing: 1637 * 1. Stable BIOS, listed because the unknown amount of 1638 * bugs and bad ACPI behaviour on older versions 1639 * 1640 * 2. BIOS or EC fw with known bugs that trigger on Linux 1641 * 1642 * 3. BIOS with known reduced functionality in older versions 1643 * 1644 * We recommend the latest BIOS and EC version. 1645 * We only support the latest BIOS and EC fw version as a rule. 1646 * 1647 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1648 * Information from users in ThinkWiki 1649 * 1650 * WARNING: we use this table also to detect that the machine is 1651 * a ThinkPad in some cases, so don't remove entries lightly. 1652 */ 1653 1654 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1655 { .vendor = (__v), \ 1656 .bios = TPID(__id1, __id2), \ 1657 .ec = TPACPI_MATCH_ANY, \ 1658 .quirks = TPACPI_MATCH_ANY << 16 \ 1659 | (__bv1) << 8 | (__bv2) } 1660 1661 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1662 __eid, __ev1, __ev2) \ 1663 { .vendor = (__v), \ 1664 .bios = TPID(__bid1, __bid2), \ 1665 .ec = __eid, \ 1666 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1667 | (__bv1) << 8 | (__bv2) } 1668 1669 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1670 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1671 1672 /* Outdated IBM BIOSes often lack the EC id string */ 1673 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1674 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1675 __bv1, __bv2, TPID(__id1, __id2), \ 1676 __ev1, __ev2), \ 1677 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1678 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1679 __ev1, __ev2) 1680 1681 /* Outdated IBM BIOSes often lack the EC id string */ 1682 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1683 __eid1, __eid2, __ev1, __ev2) \ 1684 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1685 __bv1, __bv2, TPID(__eid1, __eid2), \ 1686 __ev1, __ev2), \ 1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1688 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1689 __ev1, __ev2) 1690 1691 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1692 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1693 1694 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1695 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1696 __bv1, __bv2, TPID(__id1, __id2), \ 1697 __ev1, __ev2) 1698 1699 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1700 __eid1, __eid2, __ev1, __ev2) \ 1701 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1702 __bv1, __bv2, TPID(__eid1, __eid2), \ 1703 __ev1, __ev2) 1704 1705 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1706 /* Numeric models ------------------ */ 1707 /* FW MODEL BIOS VERS */ 1708 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1709 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1710 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1711 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1712 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1713 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1714 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1715 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1716 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1717 1718 /* A-series ------------------------- */ 1719 /* FW MODEL BIOS VERS EC VERS */ 1720 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1721 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1722 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1723 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1724 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1725 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1726 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1727 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1728 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1729 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1730 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1731 1732 /* G-series ------------------------- */ 1733 /* FW MODEL BIOS VERS */ 1734 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1735 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1736 1737 /* R-series, T-series --------------- */ 1738 /* FW MODEL BIOS VERS EC VERS */ 1739 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1740 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1741 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1742 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1743 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1744 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1745 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1746 T40/p, T41/p, T42/p (1) */ 1747 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1748 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1749 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1750 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1751 1752 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1753 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1754 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1755 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1756 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1757 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1758 1759 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1760 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1761 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1762 1763 /* BIOS FW BIOS VERS EC FW EC VERS */ 1764 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1765 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1766 1767 /* X-series ------------------------- */ 1768 /* FW MODEL BIOS VERS EC VERS */ 1769 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1770 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1771 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1772 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1773 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1774 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1775 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1776 1777 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1778 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1779 1780 /* (0) - older versions lack DMI EC fw string and functionality */ 1781 /* (1) - older versions known to lack functionality */ 1782 }; 1783 1784 #undef TPV_QL1 1785 #undef TPV_QL0 1786 #undef TPV_QI2 1787 #undef TPV_QI1 1788 #undef TPV_QI0 1789 #undef TPV_Q_X 1790 #undef TPV_Q 1791 1792 static void __init tpacpi_check_outdated_fw(void) 1793 { 1794 unsigned long fwvers; 1795 u16 ec_version, bios_version; 1796 1797 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1798 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1799 1800 if (!fwvers) 1801 return; 1802 1803 bios_version = fwvers & 0xffffU; 1804 ec_version = (fwvers >> 16) & 0xffffU; 1805 1806 /* note that unknown versions are set to 0x0000 and we use that */ 1807 if ((bios_version > thinkpad_id.bios_release) || 1808 (ec_version > thinkpad_id.ec_release && 1809 ec_version != TPACPI_MATCH_ANY)) { 1810 /* 1811 * The changelogs would let us track down the exact 1812 * reason, but it is just too much of a pain to track 1813 * it. We only list BIOSes that are either really 1814 * broken, or really stable to begin with, so it is 1815 * best if the user upgrades the firmware anyway. 1816 */ 1817 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1818 pr_warn("WARNING: This firmware may be missing critical bug " 1819 "fixes and/or important features\n"); 1820 } 1821 } 1822 1823 static bool __init tpacpi_is_fw_known(void) 1824 { 1825 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1826 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1827 } 1828 1829 /**************************************************************************** 1830 **************************************************************************** 1831 * 1832 * Subdrivers 1833 * 1834 **************************************************************************** 1835 ****************************************************************************/ 1836 1837 /************************************************************************* 1838 * thinkpad-acpi metadata subdriver 1839 */ 1840 1841 static int thinkpad_acpi_driver_read(struct seq_file *m) 1842 { 1843 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1844 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1845 return 0; 1846 } 1847 1848 static struct ibm_struct thinkpad_acpi_driver_data = { 1849 .name = "driver", 1850 .read = thinkpad_acpi_driver_read, 1851 }; 1852 1853 /************************************************************************* 1854 * Hotkey subdriver 1855 */ 1856 1857 /* 1858 * ThinkPad firmware event model 1859 * 1860 * The ThinkPad firmware has two main event interfaces: normal ACPI 1861 * notifications (which follow the ACPI standard), and a private event 1862 * interface. 1863 * 1864 * The private event interface also issues events for the hotkeys. As 1865 * the driver gained features, the event handling code ended up being 1866 * built around the hotkey subdriver. This will need to be refactored 1867 * to a more formal event API eventually. 1868 * 1869 * Some "hotkeys" are actually supposed to be used as event reports, 1870 * such as "brightness has changed", "volume has changed", depending on 1871 * the ThinkPad model and how the firmware is operating. 1872 * 1873 * Unlike other classes, hotkey-class events have mask/unmask control on 1874 * non-ancient firmware. However, how it behaves changes a lot with the 1875 * firmware model and version. 1876 */ 1877 1878 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1879 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1880 TP_ACPI_HOTKEYSCAN_FNF2, 1881 TP_ACPI_HOTKEYSCAN_FNF3, 1882 TP_ACPI_HOTKEYSCAN_FNF4, 1883 TP_ACPI_HOTKEYSCAN_FNF5, 1884 TP_ACPI_HOTKEYSCAN_FNF6, 1885 TP_ACPI_HOTKEYSCAN_FNF7, 1886 TP_ACPI_HOTKEYSCAN_FNF8, 1887 TP_ACPI_HOTKEYSCAN_FNF9, 1888 TP_ACPI_HOTKEYSCAN_FNF10, 1889 TP_ACPI_HOTKEYSCAN_FNF11, 1890 TP_ACPI_HOTKEYSCAN_FNF12, 1891 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1892 TP_ACPI_HOTKEYSCAN_FNINSERT, 1893 TP_ACPI_HOTKEYSCAN_FNDELETE, 1894 TP_ACPI_HOTKEYSCAN_FNHOME, 1895 TP_ACPI_HOTKEYSCAN_FNEND, 1896 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1897 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1898 TP_ACPI_HOTKEYSCAN_FNSPACE, 1899 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1900 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1901 TP_ACPI_HOTKEYSCAN_MUTE, 1902 TP_ACPI_HOTKEYSCAN_THINKPAD, 1903 TP_ACPI_HOTKEYSCAN_UNK1, 1904 TP_ACPI_HOTKEYSCAN_UNK2, 1905 TP_ACPI_HOTKEYSCAN_UNK3, 1906 TP_ACPI_HOTKEYSCAN_UNK4, 1907 TP_ACPI_HOTKEYSCAN_UNK5, 1908 TP_ACPI_HOTKEYSCAN_UNK6, 1909 TP_ACPI_HOTKEYSCAN_UNK7, 1910 TP_ACPI_HOTKEYSCAN_UNK8, 1911 1912 /* Hotkey keymap size */ 1913 TPACPI_HOTKEY_MAP_LEN 1914 }; 1915 1916 enum { /* Keys/events available through NVRAM polling */ 1917 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1918 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1919 }; 1920 1921 enum { /* Positions of some of the keys in hotkey masks */ 1922 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1923 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1924 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1925 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1926 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1927 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1928 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1929 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1930 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1931 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1932 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1933 }; 1934 1935 enum { /* NVRAM to ACPI HKEY group map */ 1936 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1937 TP_ACPI_HKEY_ZOOM_MASK | 1938 TP_ACPI_HKEY_DISPSWTCH_MASK | 1939 TP_ACPI_HKEY_HIBERNATE_MASK, 1940 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1941 TP_ACPI_HKEY_BRGHTDWN_MASK, 1942 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1943 TP_ACPI_HKEY_VOLDWN_MASK | 1944 TP_ACPI_HKEY_MUTE_MASK, 1945 }; 1946 1947 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1948 struct tp_nvram_state { 1949 u16 thinkpad_toggle:1; 1950 u16 zoom_toggle:1; 1951 u16 display_toggle:1; 1952 u16 thinklight_toggle:1; 1953 u16 hibernate_toggle:1; 1954 u16 displayexp_toggle:1; 1955 u16 display_state:1; 1956 u16 brightness_toggle:1; 1957 u16 volume_toggle:1; 1958 u16 mute:1; 1959 1960 u8 brightness_level; 1961 u8 volume_level; 1962 }; 1963 1964 /* kthread for the hotkey poller */ 1965 static struct task_struct *tpacpi_hotkey_task; 1966 1967 /* 1968 * Acquire mutex to write poller control variables as an 1969 * atomic block. 1970 * 1971 * Increment hotkey_config_change when changing them if you 1972 * want the kthread to forget old state. 1973 * 1974 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1975 */ 1976 static struct mutex hotkey_thread_data_mutex; 1977 static unsigned int hotkey_config_change; 1978 1979 /* 1980 * hotkey poller control variables 1981 * 1982 * Must be atomic or readers will also need to acquire mutex 1983 * 1984 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1985 * should be used only when the changes need to be taken as 1986 * a block, OR when one needs to force the kthread to forget 1987 * old state. 1988 */ 1989 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1990 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1991 1992 #define HOTKEY_CONFIG_CRITICAL_START \ 1993 do { \ 1994 mutex_lock(&hotkey_thread_data_mutex); \ 1995 hotkey_config_change++; \ 1996 } while (0); 1997 #define HOTKEY_CONFIG_CRITICAL_END \ 1998 mutex_unlock(&hotkey_thread_data_mutex); 1999 2000 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2001 2002 #define hotkey_source_mask 0U 2003 #define HOTKEY_CONFIG_CRITICAL_START 2004 #define HOTKEY_CONFIG_CRITICAL_END 2005 2006 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2007 2008 static struct mutex hotkey_mutex; 2009 2010 static enum { /* Reasons for waking up */ 2011 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2012 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2013 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2014 } hotkey_wakeup_reason; 2015 2016 static int hotkey_autosleep_ack; 2017 2018 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2019 static u32 hotkey_all_mask; /* all events supported in fw */ 2020 static u32 hotkey_reserved_mask; /* events better left disabled */ 2021 static u32 hotkey_driver_mask; /* events needed by the driver */ 2022 static u32 hotkey_user_mask; /* events visible to userspace */ 2023 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2024 2025 static u16 *hotkey_keycode_map; 2026 2027 static struct attribute_set *hotkey_dev_attributes; 2028 2029 static void tpacpi_driver_event(const unsigned int hkey_event); 2030 static void hotkey_driver_event(const unsigned int scancode); 2031 static void hotkey_poll_setup(const bool may_warn); 2032 2033 /* HKEY.MHKG() return bits */ 2034 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2035 2036 static int hotkey_get_wlsw(void) 2037 { 2038 int status; 2039 2040 if (!tp_features.hotkey_wlsw) 2041 return -ENODEV; 2042 2043 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2044 if (dbg_wlswemul) 2045 return (tpacpi_wlsw_emulstate) ? 2046 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2047 #endif 2048 2049 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2050 return -EIO; 2051 2052 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2053 } 2054 2055 static int hotkey_get_tablet_mode(int *status) 2056 { 2057 int s; 2058 2059 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2060 return -EIO; 2061 2062 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2063 return 0; 2064 } 2065 2066 /* 2067 * Reads current event mask from firmware, and updates 2068 * hotkey_acpi_mask accordingly. Also resets any bits 2069 * from hotkey_user_mask that are unavailable to be 2070 * delivered (shadow requirement of the userspace ABI). 2071 * 2072 * Call with hotkey_mutex held 2073 */ 2074 static int hotkey_mask_get(void) 2075 { 2076 if (tp_features.hotkey_mask) { 2077 u32 m = 0; 2078 2079 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2080 return -EIO; 2081 2082 hotkey_acpi_mask = m; 2083 } else { 2084 /* no mask support doesn't mean no event support... */ 2085 hotkey_acpi_mask = hotkey_all_mask; 2086 } 2087 2088 /* sync userspace-visible mask */ 2089 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2090 2091 return 0; 2092 } 2093 2094 void static hotkey_mask_warn_incomplete_mask(void) 2095 { 2096 /* log only what the user can fix... */ 2097 const u32 wantedmask = hotkey_driver_mask & 2098 ~(hotkey_acpi_mask | hotkey_source_mask) & 2099 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2100 2101 if (wantedmask) 2102 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2103 } 2104 2105 /* 2106 * Set the firmware mask when supported 2107 * 2108 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2109 * 2110 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2111 * 2112 * Call with hotkey_mutex held 2113 */ 2114 static int hotkey_mask_set(u32 mask) 2115 { 2116 int i; 2117 int rc = 0; 2118 2119 const u32 fwmask = mask & ~hotkey_source_mask; 2120 2121 if (tp_features.hotkey_mask) { 2122 for (i = 0; i < 32; i++) { 2123 if (!acpi_evalf(hkey_handle, 2124 NULL, "MHKM", "vdd", i + 1, 2125 !!(mask & (1 << i)))) { 2126 rc = -EIO; 2127 break; 2128 } 2129 } 2130 } 2131 2132 /* 2133 * We *must* make an inconditional call to hotkey_mask_get to 2134 * refresh hotkey_acpi_mask and update hotkey_user_mask 2135 * 2136 * Take the opportunity to also log when we cannot _enable_ 2137 * a given event. 2138 */ 2139 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2140 pr_notice("asked for hotkey mask 0x%08x, but " 2141 "firmware forced it to 0x%08x\n", 2142 fwmask, hotkey_acpi_mask); 2143 } 2144 2145 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2146 hotkey_mask_warn_incomplete_mask(); 2147 2148 return rc; 2149 } 2150 2151 /* 2152 * Sets hotkey_user_mask and tries to set the firmware mask 2153 * 2154 * Call with hotkey_mutex held 2155 */ 2156 static int hotkey_user_mask_set(const u32 mask) 2157 { 2158 int rc; 2159 2160 /* Give people a chance to notice they are doing something that 2161 * is bound to go boom on their users sooner or later */ 2162 if (!tp_warned.hotkey_mask_ff && 2163 (mask == 0xffff || mask == 0xffffff || 2164 mask == 0xffffffff)) { 2165 tp_warned.hotkey_mask_ff = 1; 2166 pr_notice("setting the hotkey mask to 0x%08x is likely " 2167 "not the best way to go about it\n", mask); 2168 pr_notice("please consider using the driver defaults, " 2169 "and refer to up-to-date thinkpad-acpi " 2170 "documentation\n"); 2171 } 2172 2173 /* Try to enable what the user asked for, plus whatever we need. 2174 * this syncs everything but won't enable bits in hotkey_user_mask */ 2175 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2176 2177 /* Enable the available bits in hotkey_user_mask */ 2178 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2179 2180 return rc; 2181 } 2182 2183 /* 2184 * Sets the driver hotkey mask. 2185 * 2186 * Can be called even if the hotkey subdriver is inactive 2187 */ 2188 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2189 { 2190 int rc; 2191 2192 /* Do the right thing if hotkey_init has not been called yet */ 2193 if (!tp_features.hotkey) { 2194 hotkey_driver_mask = mask; 2195 return 0; 2196 } 2197 2198 mutex_lock(&hotkey_mutex); 2199 2200 HOTKEY_CONFIG_CRITICAL_START 2201 hotkey_driver_mask = mask; 2202 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2203 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2204 #endif 2205 HOTKEY_CONFIG_CRITICAL_END 2206 2207 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2208 ~hotkey_source_mask); 2209 hotkey_poll_setup(true); 2210 2211 mutex_unlock(&hotkey_mutex); 2212 2213 return rc; 2214 } 2215 2216 static int hotkey_status_get(int *status) 2217 { 2218 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2219 return -EIO; 2220 2221 return 0; 2222 } 2223 2224 static int hotkey_status_set(bool enable) 2225 { 2226 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2227 return -EIO; 2228 2229 return 0; 2230 } 2231 2232 static void tpacpi_input_send_tabletsw(void) 2233 { 2234 int state; 2235 2236 if (tp_features.hotkey_tablet && 2237 !hotkey_get_tablet_mode(&state)) { 2238 mutex_lock(&tpacpi_inputdev_send_mutex); 2239 2240 input_report_switch(tpacpi_inputdev, 2241 SW_TABLET_MODE, !!state); 2242 input_sync(tpacpi_inputdev); 2243 2244 mutex_unlock(&tpacpi_inputdev_send_mutex); 2245 } 2246 } 2247 2248 /* Do NOT call without validating scancode first */ 2249 static void tpacpi_input_send_key(const unsigned int scancode) 2250 { 2251 const unsigned int keycode = hotkey_keycode_map[scancode]; 2252 2253 if (keycode != KEY_RESERVED) { 2254 mutex_lock(&tpacpi_inputdev_send_mutex); 2255 2256 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2257 input_report_key(tpacpi_inputdev, keycode, 1); 2258 input_sync(tpacpi_inputdev); 2259 2260 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2261 input_report_key(tpacpi_inputdev, keycode, 0); 2262 input_sync(tpacpi_inputdev); 2263 2264 mutex_unlock(&tpacpi_inputdev_send_mutex); 2265 } 2266 } 2267 2268 /* Do NOT call without validating scancode first */ 2269 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2270 { 2271 hotkey_driver_event(scancode); 2272 if (hotkey_user_mask & (1 << scancode)) 2273 tpacpi_input_send_key(scancode); 2274 } 2275 2276 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2277 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2278 2279 /* Do NOT call without validating scancode first */ 2280 static void tpacpi_hotkey_send_key(unsigned int scancode) 2281 { 2282 tpacpi_input_send_key_masked(scancode); 2283 } 2284 2285 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2286 { 2287 u8 d; 2288 2289 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2290 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2291 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2292 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2293 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2294 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2295 } 2296 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2297 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2298 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2299 } 2300 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2301 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2302 n->displayexp_toggle = 2303 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2304 } 2305 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2306 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2307 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2308 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2309 n->brightness_toggle = 2310 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2311 } 2312 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2313 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2314 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2315 >> TP_NVRAM_POS_LEVEL_VOLUME; 2316 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2317 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2318 } 2319 } 2320 2321 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2322 struct tp_nvram_state *newn, 2323 const u32 event_mask) 2324 { 2325 2326 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2327 do { \ 2328 if ((event_mask & (1 << __scancode)) && \ 2329 oldn->__member != newn->__member) \ 2330 tpacpi_hotkey_send_key(__scancode); \ 2331 } while (0) 2332 2333 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2334 do { \ 2335 if (event_mask & (1 << __scancode)) \ 2336 tpacpi_hotkey_send_key(__scancode); \ 2337 } while (0) 2338 2339 void issue_volchange(const unsigned int oldvol, 2340 const unsigned int newvol) 2341 { 2342 unsigned int i = oldvol; 2343 2344 while (i > newvol) { 2345 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2346 i--; 2347 } 2348 while (i < newvol) { 2349 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2350 i++; 2351 } 2352 } 2353 2354 void issue_brightnesschange(const unsigned int oldbrt, 2355 const unsigned int newbrt) 2356 { 2357 unsigned int i = oldbrt; 2358 2359 while (i > newbrt) { 2360 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2361 i--; 2362 } 2363 while (i < newbrt) { 2364 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2365 i++; 2366 } 2367 } 2368 2369 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2370 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2371 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2372 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2373 2374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2375 2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2377 2378 /* 2379 * Handle volume 2380 * 2381 * This code is supposed to duplicate the IBM firmware behaviour: 2382 * - Pressing MUTE issues mute hotkey message, even when already mute 2383 * - Pressing Volume up/down issues volume up/down hotkey messages, 2384 * even when already at maximum or minimum volume 2385 * - The act of unmuting issues volume up/down notification, 2386 * depending which key was used to unmute 2387 * 2388 * We are constrained to what the NVRAM can tell us, which is not much 2389 * and certainly not enough if more than one volume hotkey was pressed 2390 * since the last poll cycle. 2391 * 2392 * Just to make our life interesting, some newer Lenovo ThinkPads have 2393 * bugs in the BIOS and may fail to update volume_toggle properly. 2394 */ 2395 if (newn->mute) { 2396 /* muted */ 2397 if (!oldn->mute || 2398 oldn->volume_toggle != newn->volume_toggle || 2399 oldn->volume_level != newn->volume_level) { 2400 /* recently muted, or repeated mute keypress, or 2401 * multiple presses ending in mute */ 2402 issue_volchange(oldn->volume_level, newn->volume_level); 2403 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2404 } 2405 } else { 2406 /* unmute */ 2407 if (oldn->mute) { 2408 /* recently unmuted, issue 'unmute' keypress */ 2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2410 } 2411 if (oldn->volume_level != newn->volume_level) { 2412 issue_volchange(oldn->volume_level, newn->volume_level); 2413 } else if (oldn->volume_toggle != newn->volume_toggle) { 2414 /* repeated vol up/down keypress at end of scale ? */ 2415 if (newn->volume_level == 0) 2416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2417 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2418 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2419 } 2420 } 2421 2422 /* handle brightness */ 2423 if (oldn->brightness_level != newn->brightness_level) { 2424 issue_brightnesschange(oldn->brightness_level, 2425 newn->brightness_level); 2426 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2427 /* repeated key presses that didn't change state */ 2428 if (newn->brightness_level == 0) 2429 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2430 else if (newn->brightness_level >= bright_maxlvl 2431 && !tp_features.bright_unkfw) 2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2433 } 2434 2435 #undef TPACPI_COMPARE_KEY 2436 #undef TPACPI_MAY_SEND_KEY 2437 } 2438 2439 /* 2440 * Polling driver 2441 * 2442 * We track all events in hotkey_source_mask all the time, since 2443 * most of them are edge-based. We only issue those requested by 2444 * hotkey_user_mask or hotkey_driver_mask, though. 2445 */ 2446 static int hotkey_kthread(void *data) 2447 { 2448 struct tp_nvram_state s[2]; 2449 u32 poll_mask, event_mask; 2450 unsigned int si, so; 2451 unsigned long t; 2452 unsigned int change_detector; 2453 unsigned int poll_freq; 2454 bool was_frozen; 2455 2456 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2457 goto exit; 2458 2459 set_freezable(); 2460 2461 so = 0; 2462 si = 1; 2463 t = 0; 2464 2465 /* Initial state for compares */ 2466 mutex_lock(&hotkey_thread_data_mutex); 2467 change_detector = hotkey_config_change; 2468 poll_mask = hotkey_source_mask; 2469 event_mask = hotkey_source_mask & 2470 (hotkey_driver_mask | hotkey_user_mask); 2471 poll_freq = hotkey_poll_freq; 2472 mutex_unlock(&hotkey_thread_data_mutex); 2473 hotkey_read_nvram(&s[so], poll_mask); 2474 2475 while (!kthread_should_stop()) { 2476 if (t == 0) { 2477 if (likely(poll_freq)) 2478 t = 1000/poll_freq; 2479 else 2480 t = 100; /* should never happen... */ 2481 } 2482 t = msleep_interruptible(t); 2483 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2484 break; 2485 2486 if (t > 0 && !was_frozen) 2487 continue; 2488 2489 mutex_lock(&hotkey_thread_data_mutex); 2490 if (was_frozen || hotkey_config_change != change_detector) { 2491 /* forget old state on thaw or config change */ 2492 si = so; 2493 t = 0; 2494 change_detector = hotkey_config_change; 2495 } 2496 poll_mask = hotkey_source_mask; 2497 event_mask = hotkey_source_mask & 2498 (hotkey_driver_mask | hotkey_user_mask); 2499 poll_freq = hotkey_poll_freq; 2500 mutex_unlock(&hotkey_thread_data_mutex); 2501 2502 if (likely(poll_mask)) { 2503 hotkey_read_nvram(&s[si], poll_mask); 2504 if (likely(si != so)) { 2505 hotkey_compare_and_issue_event(&s[so], &s[si], 2506 event_mask); 2507 } 2508 } 2509 2510 so = si; 2511 si ^= 1; 2512 } 2513 2514 exit: 2515 return 0; 2516 } 2517 2518 /* call with hotkey_mutex held */ 2519 static void hotkey_poll_stop_sync(void) 2520 { 2521 if (tpacpi_hotkey_task) { 2522 kthread_stop(tpacpi_hotkey_task); 2523 tpacpi_hotkey_task = NULL; 2524 } 2525 } 2526 2527 /* call with hotkey_mutex held */ 2528 static void hotkey_poll_setup(const bool may_warn) 2529 { 2530 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2531 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2532 2533 if (hotkey_poll_freq > 0 && 2534 (poll_driver_mask || 2535 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2536 if (!tpacpi_hotkey_task) { 2537 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2538 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2539 if (IS_ERR(tpacpi_hotkey_task)) { 2540 tpacpi_hotkey_task = NULL; 2541 pr_err("could not create kernel thread " 2542 "for hotkey polling\n"); 2543 } 2544 } 2545 } else { 2546 hotkey_poll_stop_sync(); 2547 if (may_warn && (poll_driver_mask || poll_user_mask) && 2548 hotkey_poll_freq == 0) { 2549 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2550 "require polling, which is currently " 2551 "disabled\n", 2552 poll_user_mask, poll_driver_mask); 2553 } 2554 } 2555 } 2556 2557 static void hotkey_poll_setup_safe(const bool may_warn) 2558 { 2559 mutex_lock(&hotkey_mutex); 2560 hotkey_poll_setup(may_warn); 2561 mutex_unlock(&hotkey_mutex); 2562 } 2563 2564 /* call with hotkey_mutex held */ 2565 static void hotkey_poll_set_freq(unsigned int freq) 2566 { 2567 if (!freq) 2568 hotkey_poll_stop_sync(); 2569 2570 hotkey_poll_freq = freq; 2571 } 2572 2573 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2574 2575 static void hotkey_poll_setup(const bool __unused) 2576 { 2577 } 2578 2579 static void hotkey_poll_setup_safe(const bool __unused) 2580 { 2581 } 2582 2583 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2584 2585 static int hotkey_inputdev_open(struct input_dev *dev) 2586 { 2587 switch (tpacpi_lifecycle) { 2588 case TPACPI_LIFE_INIT: 2589 case TPACPI_LIFE_RUNNING: 2590 hotkey_poll_setup_safe(false); 2591 return 0; 2592 case TPACPI_LIFE_EXITING: 2593 return -EBUSY; 2594 } 2595 2596 /* Should only happen if tpacpi_lifecycle is corrupt */ 2597 BUG(); 2598 return -EBUSY; 2599 } 2600 2601 static void hotkey_inputdev_close(struct input_dev *dev) 2602 { 2603 /* disable hotkey polling when possible */ 2604 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2605 !(hotkey_source_mask & hotkey_driver_mask)) 2606 hotkey_poll_setup_safe(false); 2607 } 2608 2609 /* sysfs hotkey enable ------------------------------------------------- */ 2610 static ssize_t hotkey_enable_show(struct device *dev, 2611 struct device_attribute *attr, 2612 char *buf) 2613 { 2614 int res, status; 2615 2616 printk_deprecated_attribute("hotkey_enable", 2617 "Hotkey reporting is always enabled"); 2618 2619 res = hotkey_status_get(&status); 2620 if (res) 2621 return res; 2622 2623 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2624 } 2625 2626 static ssize_t hotkey_enable_store(struct device *dev, 2627 struct device_attribute *attr, 2628 const char *buf, size_t count) 2629 { 2630 unsigned long t; 2631 2632 printk_deprecated_attribute("hotkey_enable", 2633 "Hotkeys can be disabled through hotkey_mask"); 2634 2635 if (parse_strtoul(buf, 1, &t)) 2636 return -EINVAL; 2637 2638 if (t == 0) 2639 return -EPERM; 2640 2641 return count; 2642 } 2643 2644 static struct device_attribute dev_attr_hotkey_enable = 2645 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2646 hotkey_enable_show, hotkey_enable_store); 2647 2648 /* sysfs hotkey mask --------------------------------------------------- */ 2649 static ssize_t hotkey_mask_show(struct device *dev, 2650 struct device_attribute *attr, 2651 char *buf) 2652 { 2653 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2654 } 2655 2656 static ssize_t hotkey_mask_store(struct device *dev, 2657 struct device_attribute *attr, 2658 const char *buf, size_t count) 2659 { 2660 unsigned long t; 2661 int res; 2662 2663 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2664 return -EINVAL; 2665 2666 if (mutex_lock_killable(&hotkey_mutex)) 2667 return -ERESTARTSYS; 2668 2669 res = hotkey_user_mask_set(t); 2670 2671 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2672 hotkey_poll_setup(true); 2673 #endif 2674 2675 mutex_unlock(&hotkey_mutex); 2676 2677 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2678 2679 return (res) ? res : count; 2680 } 2681 2682 static struct device_attribute dev_attr_hotkey_mask = 2683 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2684 hotkey_mask_show, hotkey_mask_store); 2685 2686 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2687 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2688 struct device_attribute *attr, 2689 char *buf) 2690 { 2691 return sprintf(buf, "0\n"); 2692 } 2693 2694 static struct device_attribute dev_attr_hotkey_bios_enabled = 2695 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2696 2697 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2698 static ssize_t hotkey_bios_mask_show(struct device *dev, 2699 struct device_attribute *attr, 2700 char *buf) 2701 { 2702 printk_deprecated_attribute("hotkey_bios_mask", 2703 "This attribute is useless."); 2704 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2705 } 2706 2707 static struct device_attribute dev_attr_hotkey_bios_mask = 2708 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2709 2710 /* sysfs hotkey all_mask ----------------------------------------------- */ 2711 static ssize_t hotkey_all_mask_show(struct device *dev, 2712 struct device_attribute *attr, 2713 char *buf) 2714 { 2715 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2716 hotkey_all_mask | hotkey_source_mask); 2717 } 2718 2719 static struct device_attribute dev_attr_hotkey_all_mask = 2720 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2721 2722 /* sysfs hotkey recommended_mask --------------------------------------- */ 2723 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2724 struct device_attribute *attr, 2725 char *buf) 2726 { 2727 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2728 (hotkey_all_mask | hotkey_source_mask) 2729 & ~hotkey_reserved_mask); 2730 } 2731 2732 static struct device_attribute dev_attr_hotkey_recommended_mask = 2733 __ATTR(hotkey_recommended_mask, S_IRUGO, 2734 hotkey_recommended_mask_show, NULL); 2735 2736 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2737 2738 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2739 static ssize_t hotkey_source_mask_show(struct device *dev, 2740 struct device_attribute *attr, 2741 char *buf) 2742 { 2743 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2744 } 2745 2746 static ssize_t hotkey_source_mask_store(struct device *dev, 2747 struct device_attribute *attr, 2748 const char *buf, size_t count) 2749 { 2750 unsigned long t; 2751 u32 r_ev; 2752 int rc; 2753 2754 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2755 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2756 return -EINVAL; 2757 2758 if (mutex_lock_killable(&hotkey_mutex)) 2759 return -ERESTARTSYS; 2760 2761 HOTKEY_CONFIG_CRITICAL_START 2762 hotkey_source_mask = t; 2763 HOTKEY_CONFIG_CRITICAL_END 2764 2765 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2766 ~hotkey_source_mask); 2767 hotkey_poll_setup(true); 2768 2769 /* check if events needed by the driver got disabled */ 2770 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2771 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2772 2773 mutex_unlock(&hotkey_mutex); 2774 2775 if (rc < 0) 2776 pr_err("hotkey_source_mask: " 2777 "failed to update the firmware event mask!\n"); 2778 2779 if (r_ev) 2780 pr_notice("hotkey_source_mask: " 2781 "some important events were disabled: 0x%04x\n", 2782 r_ev); 2783 2784 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2785 2786 return (rc < 0) ? rc : count; 2787 } 2788 2789 static struct device_attribute dev_attr_hotkey_source_mask = 2790 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2791 hotkey_source_mask_show, hotkey_source_mask_store); 2792 2793 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2794 static ssize_t hotkey_poll_freq_show(struct device *dev, 2795 struct device_attribute *attr, 2796 char *buf) 2797 { 2798 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2799 } 2800 2801 static ssize_t hotkey_poll_freq_store(struct device *dev, 2802 struct device_attribute *attr, 2803 const char *buf, size_t count) 2804 { 2805 unsigned long t; 2806 2807 if (parse_strtoul(buf, 25, &t)) 2808 return -EINVAL; 2809 2810 if (mutex_lock_killable(&hotkey_mutex)) 2811 return -ERESTARTSYS; 2812 2813 hotkey_poll_set_freq(t); 2814 hotkey_poll_setup(true); 2815 2816 mutex_unlock(&hotkey_mutex); 2817 2818 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2819 2820 return count; 2821 } 2822 2823 static struct device_attribute dev_attr_hotkey_poll_freq = 2824 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2825 hotkey_poll_freq_show, hotkey_poll_freq_store); 2826 2827 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2828 2829 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2830 static ssize_t hotkey_radio_sw_show(struct device *dev, 2831 struct device_attribute *attr, 2832 char *buf) 2833 { 2834 int res; 2835 res = hotkey_get_wlsw(); 2836 if (res < 0) 2837 return res; 2838 2839 /* Opportunistic update */ 2840 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2841 2842 return snprintf(buf, PAGE_SIZE, "%d\n", 2843 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2844 } 2845 2846 static struct device_attribute dev_attr_hotkey_radio_sw = 2847 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2848 2849 static void hotkey_radio_sw_notify_change(void) 2850 { 2851 if (tp_features.hotkey_wlsw) 2852 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2853 "hotkey_radio_sw"); 2854 } 2855 2856 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2857 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2858 struct device_attribute *attr, 2859 char *buf) 2860 { 2861 int res, s; 2862 res = hotkey_get_tablet_mode(&s); 2863 if (res < 0) 2864 return res; 2865 2866 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2867 } 2868 2869 static struct device_attribute dev_attr_hotkey_tablet_mode = 2870 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2871 2872 static void hotkey_tablet_mode_notify_change(void) 2873 { 2874 if (tp_features.hotkey_tablet) 2875 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2876 "hotkey_tablet_mode"); 2877 } 2878 2879 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2880 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2881 struct device_attribute *attr, 2882 char *buf) 2883 { 2884 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2885 } 2886 2887 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2888 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2889 2890 static void hotkey_wakeup_reason_notify_change(void) 2891 { 2892 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2893 "wakeup_reason"); 2894 } 2895 2896 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2897 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2898 struct device_attribute *attr, 2899 char *buf) 2900 { 2901 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2902 } 2903 2904 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2905 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2906 hotkey_wakeup_hotunplug_complete_show, NULL); 2907 2908 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2909 { 2910 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2911 "wakeup_hotunplug_complete"); 2912 } 2913 2914 /* --------------------------------------------------------------------- */ 2915 2916 static struct attribute *hotkey_attributes[] __initdata = { 2917 &dev_attr_hotkey_enable.attr, 2918 &dev_attr_hotkey_bios_enabled.attr, 2919 &dev_attr_hotkey_bios_mask.attr, 2920 &dev_attr_hotkey_wakeup_reason.attr, 2921 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2922 &dev_attr_hotkey_mask.attr, 2923 &dev_attr_hotkey_all_mask.attr, 2924 &dev_attr_hotkey_recommended_mask.attr, 2925 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2926 &dev_attr_hotkey_source_mask.attr, 2927 &dev_attr_hotkey_poll_freq.attr, 2928 #endif 2929 }; 2930 2931 /* 2932 * Sync both the hw and sw blocking state of all switches 2933 */ 2934 static void tpacpi_send_radiosw_update(void) 2935 { 2936 int wlsw; 2937 2938 /* 2939 * We must sync all rfkill controllers *before* issuing any 2940 * rfkill input events, or we will race the rfkill core input 2941 * handler. 2942 * 2943 * tpacpi_inputdev_send_mutex works as a synchronization point 2944 * for the above. 2945 * 2946 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2947 */ 2948 2949 wlsw = hotkey_get_wlsw(); 2950 2951 /* Sync hw blocking state first if it is hw-blocked */ 2952 if (wlsw == TPACPI_RFK_RADIO_OFF) 2953 tpacpi_rfk_update_hwblock_state(true); 2954 2955 /* Sync sw blocking state */ 2956 tpacpi_rfk_update_swstate_all(); 2957 2958 /* Sync hw blocking state last if it is hw-unblocked */ 2959 if (wlsw == TPACPI_RFK_RADIO_ON) 2960 tpacpi_rfk_update_hwblock_state(false); 2961 2962 /* Issue rfkill input event for WLSW switch */ 2963 if (!(wlsw < 0)) { 2964 mutex_lock(&tpacpi_inputdev_send_mutex); 2965 2966 input_report_switch(tpacpi_inputdev, 2967 SW_RFKILL_ALL, (wlsw > 0)); 2968 input_sync(tpacpi_inputdev); 2969 2970 mutex_unlock(&tpacpi_inputdev_send_mutex); 2971 } 2972 2973 /* 2974 * this can be unconditional, as we will poll state again 2975 * if userspace uses the notify to read data 2976 */ 2977 hotkey_radio_sw_notify_change(); 2978 } 2979 2980 static void hotkey_exit(void) 2981 { 2982 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2983 mutex_lock(&hotkey_mutex); 2984 hotkey_poll_stop_sync(); 2985 mutex_unlock(&hotkey_mutex); 2986 #endif 2987 2988 if (hotkey_dev_attributes) 2989 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 2990 2991 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 2992 "restoring original HKEY status and mask\n"); 2993 /* yes, there is a bitwise or below, we want the 2994 * functions to be called even if one of them fail */ 2995 if (((tp_features.hotkey_mask && 2996 hotkey_mask_set(hotkey_orig_mask)) | 2997 hotkey_status_set(false)) != 0) 2998 pr_err("failed to restore hot key mask " 2999 "to BIOS defaults\n"); 3000 } 3001 3002 static void __init hotkey_unmap(const unsigned int scancode) 3003 { 3004 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3005 clear_bit(hotkey_keycode_map[scancode], 3006 tpacpi_inputdev->keybit); 3007 hotkey_keycode_map[scancode] = KEY_RESERVED; 3008 } 3009 } 3010 3011 /* 3012 * HKEY quirks: 3013 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3014 */ 3015 3016 #define TPACPI_HK_Q_INIMASK 0x0001 3017 3018 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3019 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3020 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3021 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3022 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3023 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3024 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3025 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3026 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3027 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3028 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3029 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3030 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3031 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3032 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3033 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3034 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3035 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3036 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3037 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3038 }; 3039 3040 typedef u16 tpacpi_keymap_entry_t; 3041 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3042 3043 static int __init hotkey_init(struct ibm_init_struct *iibm) 3044 { 3045 /* Requirements for changing the default keymaps: 3046 * 3047 * 1. Many of the keys are mapped to KEY_RESERVED for very 3048 * good reasons. Do not change them unless you have deep 3049 * knowledge on the IBM and Lenovo ThinkPad firmware for 3050 * the various ThinkPad models. The driver behaves 3051 * differently for KEY_RESERVED: such keys have their 3052 * hot key mask *unset* in mask_recommended, and also 3053 * in the initial hot key mask programmed into the 3054 * firmware at driver load time, which means the firm- 3055 * ware may react very differently if you change them to 3056 * something else; 3057 * 3058 * 2. You must be subscribed to the linux-thinkpad and 3059 * ibm-acpi-devel mailing lists, and you should read the 3060 * list archives since 2007 if you want to change the 3061 * keymaps. This requirement exists so that you will 3062 * know the past history of problems with the thinkpad- 3063 * acpi driver keymaps, and also that you will be 3064 * listening to any bug reports; 3065 * 3066 * 3. Do not send thinkpad-acpi specific patches directly to 3067 * for merging, *ever*. Send them to the linux-acpi 3068 * mailinglist for comments. Merging is to be done only 3069 * through acpi-test and the ACPI maintainer. 3070 * 3071 * If the above is too much to ask, don't change the keymap. 3072 * Ask the thinkpad-acpi maintainer to do it, instead. 3073 */ 3074 3075 enum keymap_index { 3076 TPACPI_KEYMAP_IBM_GENERIC = 0, 3077 TPACPI_KEYMAP_LENOVO_GENERIC, 3078 }; 3079 3080 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3081 /* Generic keymap for IBM ThinkPads */ 3082 [TPACPI_KEYMAP_IBM_GENERIC] = { 3083 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3084 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3085 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3086 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3087 3088 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3089 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3090 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3091 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3092 3093 /* brightness: firmware always reacts to them */ 3094 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3095 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3096 3097 /* Thinklight: firmware always react to it */ 3098 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3099 3100 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3101 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3102 3103 /* Volume: firmware always react to it and reprograms 3104 * the built-in *extra* mixer. Never map it to control 3105 * another mixer by default. */ 3106 KEY_RESERVED, /* 0x14: VOLUME UP */ 3107 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3108 KEY_RESERVED, /* 0x16: MUTE */ 3109 3110 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3111 3112 /* (assignments unknown, please report if found) */ 3113 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3114 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3115 }, 3116 3117 /* Generic keymap for Lenovo ThinkPads */ 3118 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3119 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3120 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3121 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3122 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3123 3124 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3125 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3126 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3127 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3128 3129 /* These should be enabled --only-- when ACPI video 3130 * is disabled (i.e. in "vendor" mode), and are handled 3131 * in a special way by the init code */ 3132 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3133 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3134 3135 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3136 3137 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3138 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3139 3140 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3141 * react to it and reprograms the built-in *extra* mixer. 3142 * Never map it to control another mixer by default. 3143 * 3144 * T60?, T61, R60?, R61: firmware and EC tries to send 3145 * these over the regular keyboard, so these are no-ops, 3146 * but there are still weird bugs re. MUTE, so do not 3147 * change unless you get test reports from all Lenovo 3148 * models. May cause the BIOS to interfere with the 3149 * HDA mixer. 3150 */ 3151 KEY_RESERVED, /* 0x14: VOLUME UP */ 3152 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3153 KEY_RESERVED, /* 0x16: MUTE */ 3154 3155 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3156 3157 /* (assignments unknown, please report if found) */ 3158 KEY_UNKNOWN, KEY_UNKNOWN, 3159 3160 /* 3161 * The mic mute button only sends 0x1a. It does not 3162 * automatically mute the mic or change the mute light. 3163 */ 3164 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3165 3166 /* (assignments unknown, please report if found) */ 3167 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3168 KEY_UNKNOWN, 3169 }, 3170 }; 3171 3172 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3173 /* Generic maps (fallback) */ 3174 { 3175 .vendor = PCI_VENDOR_ID_IBM, 3176 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3177 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3178 }, 3179 { 3180 .vendor = PCI_VENDOR_ID_LENOVO, 3181 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3182 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3183 }, 3184 }; 3185 3186 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3187 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3188 3189 int res, i; 3190 int status; 3191 int hkeyv; 3192 bool radiosw_state = false; 3193 bool tabletsw_state = false; 3194 3195 unsigned long quirks; 3196 unsigned long keymap_id; 3197 3198 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3199 "initializing hotkey subdriver\n"); 3200 3201 BUG_ON(!tpacpi_inputdev); 3202 BUG_ON(tpacpi_inputdev->open != NULL || 3203 tpacpi_inputdev->close != NULL); 3204 3205 TPACPI_ACPIHANDLE_INIT(hkey); 3206 mutex_init(&hotkey_mutex); 3207 3208 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3209 mutex_init(&hotkey_thread_data_mutex); 3210 #endif 3211 3212 /* hotkey not supported on 570 */ 3213 tp_features.hotkey = hkey_handle != NULL; 3214 3215 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3216 "hotkeys are %s\n", 3217 str_supported(tp_features.hotkey)); 3218 3219 if (!tp_features.hotkey) 3220 return 1; 3221 3222 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3223 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3224 3225 tpacpi_disable_brightness_delay(); 3226 3227 /* MUST have enough space for all attributes to be added to 3228 * hotkey_dev_attributes */ 3229 hotkey_dev_attributes = create_attr_set( 3230 ARRAY_SIZE(hotkey_attributes) + 2, 3231 NULL); 3232 if (!hotkey_dev_attributes) 3233 return -ENOMEM; 3234 res = add_many_to_attr_set(hotkey_dev_attributes, 3235 hotkey_attributes, 3236 ARRAY_SIZE(hotkey_attributes)); 3237 if (res) 3238 goto err_exit; 3239 3240 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3241 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3242 for HKEY interface version 0x100 */ 3243 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3244 if ((hkeyv >> 8) != 1) { 3245 pr_err("unknown version of the HKEY interface: 0x%x\n", 3246 hkeyv); 3247 pr_err("please report this to %s\n", TPACPI_MAIL); 3248 } else { 3249 /* 3250 * MHKV 0x100 in A31, R40, R40e, 3251 * T4x, X31, and later 3252 */ 3253 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3254 "firmware HKEY interface version: 0x%x\n", 3255 hkeyv); 3256 3257 /* Paranoia check AND init hotkey_all_mask */ 3258 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3259 "MHKA", "qd")) { 3260 pr_err("missing MHKA handler, " 3261 "please report this to %s\n", 3262 TPACPI_MAIL); 3263 /* Fallback: pre-init for FN+F3,F4,F12 */ 3264 hotkey_all_mask = 0x080cU; 3265 } else { 3266 tp_features.hotkey_mask = 1; 3267 } 3268 } 3269 } 3270 3271 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3272 "hotkey masks are %s\n", 3273 str_supported(tp_features.hotkey_mask)); 3274 3275 /* Init hotkey_all_mask if not initialized yet */ 3276 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3277 (quirks & TPACPI_HK_Q_INIMASK)) 3278 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3279 3280 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3281 if (tp_features.hotkey_mask) { 3282 /* hotkey_source_mask *must* be zero for 3283 * the first hotkey_mask_get to return hotkey_orig_mask */ 3284 res = hotkey_mask_get(); 3285 if (res) 3286 goto err_exit; 3287 3288 hotkey_orig_mask = hotkey_acpi_mask; 3289 } else { 3290 hotkey_orig_mask = hotkey_all_mask; 3291 hotkey_acpi_mask = hotkey_all_mask; 3292 } 3293 3294 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3295 if (dbg_wlswemul) { 3296 tp_features.hotkey_wlsw = 1; 3297 radiosw_state = !!tpacpi_wlsw_emulstate; 3298 pr_info("radio switch emulation enabled\n"); 3299 } else 3300 #endif 3301 /* Not all thinkpads have a hardware radio switch */ 3302 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3303 tp_features.hotkey_wlsw = 1; 3304 radiosw_state = !!status; 3305 pr_info("radio switch found; radios are %s\n", 3306 enabled(status, 0)); 3307 } 3308 if (tp_features.hotkey_wlsw) 3309 res = add_to_attr_set(hotkey_dev_attributes, 3310 &dev_attr_hotkey_radio_sw.attr); 3311 3312 /* For X41t, X60t, X61t Tablets... */ 3313 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3314 tp_features.hotkey_tablet = 1; 3315 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3316 pr_info("possible tablet mode switch found; " 3317 "ThinkPad in %s mode\n", 3318 (tabletsw_state) ? "tablet" : "laptop"); 3319 res = add_to_attr_set(hotkey_dev_attributes, 3320 &dev_attr_hotkey_tablet_mode.attr); 3321 } 3322 3323 if (!res) 3324 res = register_attr_set_with_sysfs( 3325 hotkey_dev_attributes, 3326 &tpacpi_pdev->dev.kobj); 3327 if (res) 3328 goto err_exit; 3329 3330 /* Set up key map */ 3331 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3332 GFP_KERNEL); 3333 if (!hotkey_keycode_map) { 3334 pr_err("failed to allocate memory for key map\n"); 3335 res = -ENOMEM; 3336 goto err_exit; 3337 } 3338 3339 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3340 ARRAY_SIZE(tpacpi_keymap_qtable)); 3341 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3342 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3343 "using keymap number %lu\n", keymap_id); 3344 3345 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3346 TPACPI_HOTKEY_MAP_SIZE); 3347 3348 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3349 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3350 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3351 tpacpi_inputdev->keycode = hotkey_keycode_map; 3352 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3353 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3354 input_set_capability(tpacpi_inputdev, EV_KEY, 3355 hotkey_keycode_map[i]); 3356 } else { 3357 if (i < sizeof(hotkey_reserved_mask)*8) 3358 hotkey_reserved_mask |= 1 << i; 3359 } 3360 } 3361 3362 if (tp_features.hotkey_wlsw) { 3363 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3364 input_report_switch(tpacpi_inputdev, 3365 SW_RFKILL_ALL, radiosw_state); 3366 } 3367 if (tp_features.hotkey_tablet) { 3368 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3369 input_report_switch(tpacpi_inputdev, 3370 SW_TABLET_MODE, tabletsw_state); 3371 } 3372 3373 /* Do not issue duplicate brightness change events to 3374 * userspace. tpacpi_detect_brightness_capabilities() must have 3375 * been called before this point */ 3376 if (acpi_video_backlight_support()) { 3377 pr_info("This ThinkPad has standard ACPI backlight " 3378 "brightness control, supported by the ACPI " 3379 "video driver\n"); 3380 pr_notice("Disabling thinkpad-acpi brightness events " 3381 "by default...\n"); 3382 3383 /* Disable brightness up/down on Lenovo thinkpads when 3384 * ACPI is handling them, otherwise it is plain impossible 3385 * for userspace to do something even remotely sane */ 3386 hotkey_reserved_mask |= 3387 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3388 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3389 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3390 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3391 } 3392 3393 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3394 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3395 & ~hotkey_all_mask 3396 & ~hotkey_reserved_mask; 3397 3398 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3399 "hotkey source mask 0x%08x, polling freq %u\n", 3400 hotkey_source_mask, hotkey_poll_freq); 3401 #endif 3402 3403 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3404 "enabling firmware HKEY event interface...\n"); 3405 res = hotkey_status_set(true); 3406 if (res) { 3407 hotkey_exit(); 3408 return res; 3409 } 3410 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3411 | hotkey_driver_mask) 3412 & ~hotkey_source_mask); 3413 if (res < 0 && res != -ENXIO) { 3414 hotkey_exit(); 3415 return res; 3416 } 3417 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3418 & ~hotkey_reserved_mask; 3419 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3420 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3421 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3422 3423 tpacpi_inputdev->open = &hotkey_inputdev_open; 3424 tpacpi_inputdev->close = &hotkey_inputdev_close; 3425 3426 hotkey_poll_setup_safe(true); 3427 3428 return 0; 3429 3430 err_exit: 3431 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3432 hotkey_dev_attributes = NULL; 3433 3434 return (res < 0)? res : 1; 3435 } 3436 3437 static bool hotkey_notify_hotkey(const u32 hkey, 3438 bool *send_acpi_ev, 3439 bool *ignore_acpi_ev) 3440 { 3441 /* 0x1000-0x1FFF: key presses */ 3442 unsigned int scancode = hkey & 0xfff; 3443 *send_acpi_ev = true; 3444 *ignore_acpi_ev = false; 3445 3446 /* HKEY event 0x1001 is scancode 0x00 */ 3447 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3448 scancode--; 3449 if (!(hotkey_source_mask & (1 << scancode))) { 3450 tpacpi_input_send_key_masked(scancode); 3451 *send_acpi_ev = false; 3452 } else { 3453 *ignore_acpi_ev = true; 3454 } 3455 return true; 3456 } 3457 return false; 3458 } 3459 3460 static bool hotkey_notify_wakeup(const u32 hkey, 3461 bool *send_acpi_ev, 3462 bool *ignore_acpi_ev) 3463 { 3464 /* 0x2000-0x2FFF: Wakeup reason */ 3465 *send_acpi_ev = true; 3466 *ignore_acpi_ev = false; 3467 3468 switch (hkey) { 3469 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3470 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3471 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3472 *ignore_acpi_ev = true; 3473 break; 3474 3475 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3476 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3477 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3478 *ignore_acpi_ev = true; 3479 break; 3480 3481 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3482 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3483 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3484 /* how to auto-heal: */ 3485 /* 2313: woke up from S3, go to S4/S5 */ 3486 /* 2413: woke up from S4, go to S5 */ 3487 break; 3488 3489 default: 3490 return false; 3491 } 3492 3493 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3494 pr_info("woke up due to a hot-unplug request...\n"); 3495 hotkey_wakeup_reason_notify_change(); 3496 } 3497 return true; 3498 } 3499 3500 static bool hotkey_notify_dockevent(const u32 hkey, 3501 bool *send_acpi_ev, 3502 bool *ignore_acpi_ev) 3503 { 3504 /* 0x4000-0x4FFF: dock-related events */ 3505 *send_acpi_ev = true; 3506 *ignore_acpi_ev = false; 3507 3508 switch (hkey) { 3509 case TP_HKEY_EV_UNDOCK_ACK: 3510 /* ACPI undock operation completed after wakeup */ 3511 hotkey_autosleep_ack = 1; 3512 pr_info("undocked\n"); 3513 hotkey_wakeup_hotunplug_complete_notify_change(); 3514 return true; 3515 3516 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3517 pr_info("docked into hotplug port replicator\n"); 3518 return true; 3519 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3520 pr_info("undocked from hotplug port replicator\n"); 3521 return true; 3522 3523 default: 3524 return false; 3525 } 3526 } 3527 3528 static bool hotkey_notify_usrevent(const u32 hkey, 3529 bool *send_acpi_ev, 3530 bool *ignore_acpi_ev) 3531 { 3532 /* 0x5000-0x5FFF: human interface helpers */ 3533 *send_acpi_ev = true; 3534 *ignore_acpi_ev = false; 3535 3536 switch (hkey) { 3537 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3538 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3539 return true; 3540 3541 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3542 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3543 tpacpi_input_send_tabletsw(); 3544 hotkey_tablet_mode_notify_change(); 3545 *send_acpi_ev = false; 3546 return true; 3547 3548 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3549 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3550 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3551 /* do not propagate these events */ 3552 *ignore_acpi_ev = true; 3553 return true; 3554 3555 default: 3556 return false; 3557 } 3558 } 3559 3560 static void thermal_dump_all_sensors(void); 3561 3562 static bool hotkey_notify_6xxx(const u32 hkey, 3563 bool *send_acpi_ev, 3564 bool *ignore_acpi_ev) 3565 { 3566 bool known = true; 3567 3568 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3569 *send_acpi_ev = true; 3570 *ignore_acpi_ev = false; 3571 3572 switch (hkey) { 3573 case TP_HKEY_EV_THM_TABLE_CHANGED: 3574 pr_info("EC reports that Thermal Table has changed\n"); 3575 /* recommended action: do nothing, we don't have 3576 * Lenovo ATM information */ 3577 return true; 3578 case TP_HKEY_EV_ALARM_BAT_HOT: 3579 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3580 /* recommended action: warn user through gui */ 3581 break; 3582 case TP_HKEY_EV_ALARM_BAT_XHOT: 3583 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3584 /* recommended action: immediate sleep/hibernate */ 3585 break; 3586 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3587 pr_crit("THERMAL ALARM: " 3588 "a sensor reports something is too hot!\n"); 3589 /* recommended action: warn user through gui, that */ 3590 /* some internal component is too hot */ 3591 break; 3592 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3593 pr_alert("THERMAL EMERGENCY: " 3594 "a sensor reports something is extremely hot!\n"); 3595 /* recommended action: immediate sleep/hibernate */ 3596 break; 3597 case TP_HKEY_EV_AC_CHANGED: 3598 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3599 * AC status changed; can be triggered by plugging or 3600 * unplugging AC adapter, docking or undocking. */ 3601 3602 /* fallthrough */ 3603 3604 case TP_HKEY_EV_KEY_NUMLOCK: 3605 case TP_HKEY_EV_KEY_FN: 3606 /* key press events, we just ignore them as long as the EC 3607 * is still reporting them in the normal keyboard stream */ 3608 *send_acpi_ev = false; 3609 *ignore_acpi_ev = true; 3610 return true; 3611 3612 default: 3613 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3614 known = false; 3615 } 3616 3617 thermal_dump_all_sensors(); 3618 3619 return known; 3620 } 3621 3622 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3623 { 3624 u32 hkey; 3625 bool send_acpi_ev; 3626 bool ignore_acpi_ev; 3627 bool known_ev; 3628 3629 if (event != 0x80) { 3630 pr_err("unknown HKEY notification event %d\n", event); 3631 /* forward it to userspace, maybe it knows how to handle it */ 3632 acpi_bus_generate_netlink_event( 3633 ibm->acpi->device->pnp.device_class, 3634 dev_name(&ibm->acpi->device->dev), 3635 event, 0); 3636 return; 3637 } 3638 3639 while (1) { 3640 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3641 pr_err("failed to retrieve HKEY event\n"); 3642 return; 3643 } 3644 3645 if (hkey == 0) { 3646 /* queue empty */ 3647 return; 3648 } 3649 3650 send_acpi_ev = true; 3651 ignore_acpi_ev = false; 3652 3653 switch (hkey >> 12) { 3654 case 1: 3655 /* 0x1000-0x1FFF: key presses */ 3656 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3657 &ignore_acpi_ev); 3658 break; 3659 case 2: 3660 /* 0x2000-0x2FFF: Wakeup reason */ 3661 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3662 &ignore_acpi_ev); 3663 break; 3664 case 3: 3665 /* 0x3000-0x3FFF: bay-related wakeups */ 3666 switch (hkey) { 3667 case TP_HKEY_EV_BAYEJ_ACK: 3668 hotkey_autosleep_ack = 1; 3669 pr_info("bay ejected\n"); 3670 hotkey_wakeup_hotunplug_complete_notify_change(); 3671 known_ev = true; 3672 break; 3673 case TP_HKEY_EV_OPTDRV_EJ: 3674 /* FIXME: kick libata if SATA link offline */ 3675 known_ev = true; 3676 break; 3677 default: 3678 known_ev = false; 3679 } 3680 break; 3681 case 4: 3682 /* 0x4000-0x4FFF: dock-related events */ 3683 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3684 &ignore_acpi_ev); 3685 break; 3686 case 5: 3687 /* 0x5000-0x5FFF: human interface helpers */ 3688 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3689 &ignore_acpi_ev); 3690 break; 3691 case 6: 3692 /* 0x6000-0x6FFF: thermal alarms/notices and 3693 * keyboard events */ 3694 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3695 &ignore_acpi_ev); 3696 break; 3697 case 7: 3698 /* 0x7000-0x7FFF: misc */ 3699 if (tp_features.hotkey_wlsw && 3700 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3701 tpacpi_send_radiosw_update(); 3702 send_acpi_ev = 0; 3703 known_ev = true; 3704 break; 3705 } 3706 /* fallthrough to default */ 3707 default: 3708 known_ev = false; 3709 } 3710 if (!known_ev) { 3711 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3712 pr_notice("please report the conditions when this " 3713 "event happened to %s\n", TPACPI_MAIL); 3714 } 3715 3716 /* netlink events */ 3717 if (!ignore_acpi_ev && send_acpi_ev) { 3718 acpi_bus_generate_netlink_event( 3719 ibm->acpi->device->pnp.device_class, 3720 dev_name(&ibm->acpi->device->dev), 3721 event, hkey); 3722 } 3723 } 3724 } 3725 3726 static void hotkey_suspend(void) 3727 { 3728 /* Do these on suspend, we get the events on early resume! */ 3729 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3730 hotkey_autosleep_ack = 0; 3731 } 3732 3733 static void hotkey_resume(void) 3734 { 3735 tpacpi_disable_brightness_delay(); 3736 3737 if (hotkey_status_set(true) < 0 || 3738 hotkey_mask_set(hotkey_acpi_mask) < 0) 3739 pr_err("error while attempting to reset the event " 3740 "firmware interface\n"); 3741 3742 tpacpi_send_radiosw_update(); 3743 hotkey_tablet_mode_notify_change(); 3744 hotkey_wakeup_reason_notify_change(); 3745 hotkey_wakeup_hotunplug_complete_notify_change(); 3746 hotkey_poll_setup_safe(false); 3747 } 3748 3749 /* procfs -------------------------------------------------------------- */ 3750 static int hotkey_read(struct seq_file *m) 3751 { 3752 int res, status; 3753 3754 if (!tp_features.hotkey) { 3755 seq_printf(m, "status:\t\tnot supported\n"); 3756 return 0; 3757 } 3758 3759 if (mutex_lock_killable(&hotkey_mutex)) 3760 return -ERESTARTSYS; 3761 res = hotkey_status_get(&status); 3762 if (!res) 3763 res = hotkey_mask_get(); 3764 mutex_unlock(&hotkey_mutex); 3765 if (res) 3766 return res; 3767 3768 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3769 if (hotkey_all_mask) { 3770 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3771 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3772 } else { 3773 seq_printf(m, "mask:\t\tnot supported\n"); 3774 seq_printf(m, "commands:\tenable, disable, reset\n"); 3775 } 3776 3777 return 0; 3778 } 3779 3780 static void hotkey_enabledisable_warn(bool enable) 3781 { 3782 tpacpi_log_usertask("procfs hotkey enable/disable"); 3783 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3784 pr_fmt("hotkey enable/disable functionality has been " 3785 "removed from the driver. " 3786 "Hotkeys are always enabled.\n"))) 3787 pr_err("Please remove the hotkey=enable module " 3788 "parameter, it is deprecated. " 3789 "Hotkeys are always enabled.\n"); 3790 } 3791 3792 static int hotkey_write(char *buf) 3793 { 3794 int res; 3795 u32 mask; 3796 char *cmd; 3797 3798 if (!tp_features.hotkey) 3799 return -ENODEV; 3800 3801 if (mutex_lock_killable(&hotkey_mutex)) 3802 return -ERESTARTSYS; 3803 3804 mask = hotkey_user_mask; 3805 3806 res = 0; 3807 while ((cmd = next_cmd(&buf))) { 3808 if (strlencmp(cmd, "enable") == 0) { 3809 hotkey_enabledisable_warn(1); 3810 } else if (strlencmp(cmd, "disable") == 0) { 3811 hotkey_enabledisable_warn(0); 3812 res = -EPERM; 3813 } else if (strlencmp(cmd, "reset") == 0) { 3814 mask = (hotkey_all_mask | hotkey_source_mask) 3815 & ~hotkey_reserved_mask; 3816 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3817 /* mask set */ 3818 } else if (sscanf(cmd, "%x", &mask) == 1) { 3819 /* mask set */ 3820 } else { 3821 res = -EINVAL; 3822 goto errexit; 3823 } 3824 } 3825 3826 if (!res) { 3827 tpacpi_disclose_usertask("procfs hotkey", 3828 "set mask to 0x%08x\n", mask); 3829 res = hotkey_user_mask_set(mask); 3830 } 3831 3832 errexit: 3833 mutex_unlock(&hotkey_mutex); 3834 return res; 3835 } 3836 3837 static const struct acpi_device_id ibm_htk_device_ids[] = { 3838 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 3839 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 3840 {"", 0}, 3841 }; 3842 3843 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3844 .hid = ibm_htk_device_ids, 3845 .notify = hotkey_notify, 3846 .handle = &hkey_handle, 3847 .type = ACPI_DEVICE_NOTIFY, 3848 }; 3849 3850 static struct ibm_struct hotkey_driver_data = { 3851 .name = "hotkey", 3852 .read = hotkey_read, 3853 .write = hotkey_write, 3854 .exit = hotkey_exit, 3855 .resume = hotkey_resume, 3856 .suspend = hotkey_suspend, 3857 .acpi = &ibm_hotkey_acpidriver, 3858 }; 3859 3860 /************************************************************************* 3861 * Bluetooth subdriver 3862 */ 3863 3864 enum { 3865 /* ACPI GBDC/SBDC bits */ 3866 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3867 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3868 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3869 0 = disable, 1 = enable */ 3870 }; 3871 3872 enum { 3873 /* ACPI \BLTH commands */ 3874 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3875 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3876 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3877 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3878 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3879 }; 3880 3881 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3882 3883 static int bluetooth_get_status(void) 3884 { 3885 int status; 3886 3887 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3888 if (dbg_bluetoothemul) 3889 return (tpacpi_bluetooth_emulstate) ? 3890 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3891 #endif 3892 3893 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3894 return -EIO; 3895 3896 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3897 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3898 } 3899 3900 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3901 { 3902 int status; 3903 3904 vdbg_printk(TPACPI_DBG_RFKILL, 3905 "will attempt to %s bluetooth\n", 3906 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3907 3908 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3909 if (dbg_bluetoothemul) { 3910 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3911 return 0; 3912 } 3913 #endif 3914 3915 if (state == TPACPI_RFK_RADIO_ON) 3916 status = TP_ACPI_BLUETOOTH_RADIOSSW 3917 | TP_ACPI_BLUETOOTH_RESUMECTRL; 3918 else 3919 status = 0; 3920 3921 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3922 return -EIO; 3923 3924 return 0; 3925 } 3926 3927 /* sysfs bluetooth enable ---------------------------------------------- */ 3928 static ssize_t bluetooth_enable_show(struct device *dev, 3929 struct device_attribute *attr, 3930 char *buf) 3931 { 3932 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3933 attr, buf); 3934 } 3935 3936 static ssize_t bluetooth_enable_store(struct device *dev, 3937 struct device_attribute *attr, 3938 const char *buf, size_t count) 3939 { 3940 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3941 attr, buf, count); 3942 } 3943 3944 static struct device_attribute dev_attr_bluetooth_enable = 3945 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3946 bluetooth_enable_show, bluetooth_enable_store); 3947 3948 /* --------------------------------------------------------------------- */ 3949 3950 static struct attribute *bluetooth_attributes[] = { 3951 &dev_attr_bluetooth_enable.attr, 3952 NULL 3953 }; 3954 3955 static const struct attribute_group bluetooth_attr_group = { 3956 .attrs = bluetooth_attributes, 3957 }; 3958 3959 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 3960 .get_status = bluetooth_get_status, 3961 .set_status = bluetooth_set_status, 3962 }; 3963 3964 static void bluetooth_shutdown(void) 3965 { 3966 /* Order firmware to save current state to NVRAM */ 3967 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 3968 TP_ACPI_BLTH_SAVE_STATE)) 3969 pr_notice("failed to save bluetooth state to NVRAM\n"); 3970 else 3971 vdbg_printk(TPACPI_DBG_RFKILL, 3972 "bluetooth state saved to NVRAM\n"); 3973 } 3974 3975 static void bluetooth_exit(void) 3976 { 3977 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3978 &bluetooth_attr_group); 3979 3980 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 3981 3982 bluetooth_shutdown(); 3983 } 3984 3985 static int __init bluetooth_init(struct ibm_init_struct *iibm) 3986 { 3987 int res; 3988 int status = 0; 3989 3990 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 3991 "initializing bluetooth subdriver\n"); 3992 3993 TPACPI_ACPIHANDLE_INIT(hkey); 3994 3995 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 3996 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 3997 tp_features.bluetooth = hkey_handle && 3998 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 3999 4000 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4001 "bluetooth is %s, status 0x%02x\n", 4002 str_supported(tp_features.bluetooth), 4003 status); 4004 4005 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4006 if (dbg_bluetoothemul) { 4007 tp_features.bluetooth = 1; 4008 pr_info("bluetooth switch emulation enabled\n"); 4009 } else 4010 #endif 4011 if (tp_features.bluetooth && 4012 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4013 /* no bluetooth hardware present in system */ 4014 tp_features.bluetooth = 0; 4015 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4016 "bluetooth hardware not installed\n"); 4017 } 4018 4019 if (!tp_features.bluetooth) 4020 return 1; 4021 4022 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4023 &bluetooth_tprfk_ops, 4024 RFKILL_TYPE_BLUETOOTH, 4025 TPACPI_RFK_BLUETOOTH_SW_NAME, 4026 true); 4027 if (res) 4028 return res; 4029 4030 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4031 &bluetooth_attr_group); 4032 if (res) { 4033 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4034 return res; 4035 } 4036 4037 return 0; 4038 } 4039 4040 /* procfs -------------------------------------------------------------- */ 4041 static int bluetooth_read(struct seq_file *m) 4042 { 4043 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4044 } 4045 4046 static int bluetooth_write(char *buf) 4047 { 4048 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4049 } 4050 4051 static struct ibm_struct bluetooth_driver_data = { 4052 .name = "bluetooth", 4053 .read = bluetooth_read, 4054 .write = bluetooth_write, 4055 .exit = bluetooth_exit, 4056 .shutdown = bluetooth_shutdown, 4057 }; 4058 4059 /************************************************************************* 4060 * Wan subdriver 4061 */ 4062 4063 enum { 4064 /* ACPI GWAN/SWAN bits */ 4065 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4066 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4067 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4068 0 = disable, 1 = enable */ 4069 }; 4070 4071 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4072 4073 static int wan_get_status(void) 4074 { 4075 int status; 4076 4077 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4078 if (dbg_wwanemul) 4079 return (tpacpi_wwan_emulstate) ? 4080 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4081 #endif 4082 4083 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4084 return -EIO; 4085 4086 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4087 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4088 } 4089 4090 static int wan_set_status(enum tpacpi_rfkill_state state) 4091 { 4092 int status; 4093 4094 vdbg_printk(TPACPI_DBG_RFKILL, 4095 "will attempt to %s wwan\n", 4096 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4097 4098 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4099 if (dbg_wwanemul) { 4100 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4101 return 0; 4102 } 4103 #endif 4104 4105 if (state == TPACPI_RFK_RADIO_ON) 4106 status = TP_ACPI_WANCARD_RADIOSSW 4107 | TP_ACPI_WANCARD_RESUMECTRL; 4108 else 4109 status = 0; 4110 4111 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4112 return -EIO; 4113 4114 return 0; 4115 } 4116 4117 /* sysfs wan enable ---------------------------------------------------- */ 4118 static ssize_t wan_enable_show(struct device *dev, 4119 struct device_attribute *attr, 4120 char *buf) 4121 { 4122 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4123 attr, buf); 4124 } 4125 4126 static ssize_t wan_enable_store(struct device *dev, 4127 struct device_attribute *attr, 4128 const char *buf, size_t count) 4129 { 4130 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4131 attr, buf, count); 4132 } 4133 4134 static struct device_attribute dev_attr_wan_enable = 4135 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4136 wan_enable_show, wan_enable_store); 4137 4138 /* --------------------------------------------------------------------- */ 4139 4140 static struct attribute *wan_attributes[] = { 4141 &dev_attr_wan_enable.attr, 4142 NULL 4143 }; 4144 4145 static const struct attribute_group wan_attr_group = { 4146 .attrs = wan_attributes, 4147 }; 4148 4149 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4150 .get_status = wan_get_status, 4151 .set_status = wan_set_status, 4152 }; 4153 4154 static void wan_shutdown(void) 4155 { 4156 /* Order firmware to save current state to NVRAM */ 4157 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4158 TP_ACPI_WGSV_SAVE_STATE)) 4159 pr_notice("failed to save WWAN state to NVRAM\n"); 4160 else 4161 vdbg_printk(TPACPI_DBG_RFKILL, 4162 "WWAN state saved to NVRAM\n"); 4163 } 4164 4165 static void wan_exit(void) 4166 { 4167 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4168 &wan_attr_group); 4169 4170 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4171 4172 wan_shutdown(); 4173 } 4174 4175 static int __init wan_init(struct ibm_init_struct *iibm) 4176 { 4177 int res; 4178 int status = 0; 4179 4180 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4181 "initializing wan subdriver\n"); 4182 4183 TPACPI_ACPIHANDLE_INIT(hkey); 4184 4185 tp_features.wan = hkey_handle && 4186 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4187 4188 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4189 "wan is %s, status 0x%02x\n", 4190 str_supported(tp_features.wan), 4191 status); 4192 4193 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4194 if (dbg_wwanemul) { 4195 tp_features.wan = 1; 4196 pr_info("wwan switch emulation enabled\n"); 4197 } else 4198 #endif 4199 if (tp_features.wan && 4200 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4201 /* no wan hardware present in system */ 4202 tp_features.wan = 0; 4203 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4204 "wan hardware not installed\n"); 4205 } 4206 4207 if (!tp_features.wan) 4208 return 1; 4209 4210 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4211 &wan_tprfk_ops, 4212 RFKILL_TYPE_WWAN, 4213 TPACPI_RFK_WWAN_SW_NAME, 4214 true); 4215 if (res) 4216 return res; 4217 4218 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4219 &wan_attr_group); 4220 4221 if (res) { 4222 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4223 return res; 4224 } 4225 4226 return 0; 4227 } 4228 4229 /* procfs -------------------------------------------------------------- */ 4230 static int wan_read(struct seq_file *m) 4231 { 4232 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4233 } 4234 4235 static int wan_write(char *buf) 4236 { 4237 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4238 } 4239 4240 static struct ibm_struct wan_driver_data = { 4241 .name = "wan", 4242 .read = wan_read, 4243 .write = wan_write, 4244 .exit = wan_exit, 4245 .shutdown = wan_shutdown, 4246 }; 4247 4248 /************************************************************************* 4249 * UWB subdriver 4250 */ 4251 4252 enum { 4253 /* ACPI GUWB/SUWB bits */ 4254 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4255 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4256 }; 4257 4258 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4259 4260 static int uwb_get_status(void) 4261 { 4262 int status; 4263 4264 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4265 if (dbg_uwbemul) 4266 return (tpacpi_uwb_emulstate) ? 4267 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4268 #endif 4269 4270 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4271 return -EIO; 4272 4273 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4274 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4275 } 4276 4277 static int uwb_set_status(enum tpacpi_rfkill_state state) 4278 { 4279 int status; 4280 4281 vdbg_printk(TPACPI_DBG_RFKILL, 4282 "will attempt to %s UWB\n", 4283 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4284 4285 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4286 if (dbg_uwbemul) { 4287 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4288 return 0; 4289 } 4290 #endif 4291 4292 if (state == TPACPI_RFK_RADIO_ON) 4293 status = TP_ACPI_UWB_RADIOSSW; 4294 else 4295 status = 0; 4296 4297 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4298 return -EIO; 4299 4300 return 0; 4301 } 4302 4303 /* --------------------------------------------------------------------- */ 4304 4305 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4306 .get_status = uwb_get_status, 4307 .set_status = uwb_set_status, 4308 }; 4309 4310 static void uwb_exit(void) 4311 { 4312 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4313 } 4314 4315 static int __init uwb_init(struct ibm_init_struct *iibm) 4316 { 4317 int res; 4318 int status = 0; 4319 4320 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4321 "initializing uwb subdriver\n"); 4322 4323 TPACPI_ACPIHANDLE_INIT(hkey); 4324 4325 tp_features.uwb = hkey_handle && 4326 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4327 4328 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4329 "uwb is %s, status 0x%02x\n", 4330 str_supported(tp_features.uwb), 4331 status); 4332 4333 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4334 if (dbg_uwbemul) { 4335 tp_features.uwb = 1; 4336 pr_info("uwb switch emulation enabled\n"); 4337 } else 4338 #endif 4339 if (tp_features.uwb && 4340 !(status & TP_ACPI_UWB_HWPRESENT)) { 4341 /* no uwb hardware present in system */ 4342 tp_features.uwb = 0; 4343 dbg_printk(TPACPI_DBG_INIT, 4344 "uwb hardware not installed\n"); 4345 } 4346 4347 if (!tp_features.uwb) 4348 return 1; 4349 4350 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4351 &uwb_tprfk_ops, 4352 RFKILL_TYPE_UWB, 4353 TPACPI_RFK_UWB_SW_NAME, 4354 false); 4355 return res; 4356 } 4357 4358 static struct ibm_struct uwb_driver_data = { 4359 .name = "uwb", 4360 .exit = uwb_exit, 4361 .flags.experimental = 1, 4362 }; 4363 4364 /************************************************************************* 4365 * Video subdriver 4366 */ 4367 4368 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4369 4370 enum video_access_mode { 4371 TPACPI_VIDEO_NONE = 0, 4372 TPACPI_VIDEO_570, /* 570 */ 4373 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4374 TPACPI_VIDEO_NEW, /* all others */ 4375 }; 4376 4377 enum { /* video status flags, based on VIDEO_570 */ 4378 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4379 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4380 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4381 }; 4382 4383 enum { /* TPACPI_VIDEO_570 constants */ 4384 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4385 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4386 * video_status_flags */ 4387 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4388 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4389 }; 4390 4391 static enum video_access_mode video_supported; 4392 static int video_orig_autosw; 4393 4394 static int video_autosw_get(void); 4395 static int video_autosw_set(int enable); 4396 4397 TPACPI_HANDLE(vid, root, 4398 "\\_SB.PCI.AGP.VGA", /* 570 */ 4399 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4400 "\\_SB.PCI0.VID0", /* 770e */ 4401 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4402 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4403 "\\_SB.PCI0.AGP.VID", /* all others */ 4404 ); /* R30, R31 */ 4405 4406 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4407 4408 static int __init video_init(struct ibm_init_struct *iibm) 4409 { 4410 int ivga; 4411 4412 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4413 4414 TPACPI_ACPIHANDLE_INIT(vid); 4415 if (tpacpi_is_ibm()) 4416 TPACPI_ACPIHANDLE_INIT(vid2); 4417 4418 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4419 /* G41, assume IVGA doesn't change */ 4420 vid_handle = vid2_handle; 4421 4422 if (!vid_handle) 4423 /* video switching not supported on R30, R31 */ 4424 video_supported = TPACPI_VIDEO_NONE; 4425 else if (tpacpi_is_ibm() && 4426 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4427 /* 570 */ 4428 video_supported = TPACPI_VIDEO_570; 4429 else if (tpacpi_is_ibm() && 4430 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4431 /* 600e/x, 770e, 770x */ 4432 video_supported = TPACPI_VIDEO_770; 4433 else 4434 /* all others */ 4435 video_supported = TPACPI_VIDEO_NEW; 4436 4437 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4438 str_supported(video_supported != TPACPI_VIDEO_NONE), 4439 video_supported); 4440 4441 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4442 } 4443 4444 static void video_exit(void) 4445 { 4446 dbg_printk(TPACPI_DBG_EXIT, 4447 "restoring original video autoswitch mode\n"); 4448 if (video_autosw_set(video_orig_autosw)) 4449 pr_err("error while trying to restore original " 4450 "video autoswitch mode\n"); 4451 } 4452 4453 static int video_outputsw_get(void) 4454 { 4455 int status = 0; 4456 int i; 4457 4458 switch (video_supported) { 4459 case TPACPI_VIDEO_570: 4460 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4461 TP_ACPI_VIDEO_570_PHSCMD)) 4462 return -EIO; 4463 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4464 break; 4465 case TPACPI_VIDEO_770: 4466 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4467 return -EIO; 4468 if (i) 4469 status |= TP_ACPI_VIDEO_S_LCD; 4470 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4471 return -EIO; 4472 if (i) 4473 status |= TP_ACPI_VIDEO_S_CRT; 4474 break; 4475 case TPACPI_VIDEO_NEW: 4476 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4477 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4478 return -EIO; 4479 if (i) 4480 status |= TP_ACPI_VIDEO_S_CRT; 4481 4482 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4483 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4484 return -EIO; 4485 if (i) 4486 status |= TP_ACPI_VIDEO_S_LCD; 4487 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4488 return -EIO; 4489 if (i) 4490 status |= TP_ACPI_VIDEO_S_DVI; 4491 break; 4492 default: 4493 return -ENOSYS; 4494 } 4495 4496 return status; 4497 } 4498 4499 static int video_outputsw_set(int status) 4500 { 4501 int autosw; 4502 int res = 0; 4503 4504 switch (video_supported) { 4505 case TPACPI_VIDEO_570: 4506 res = acpi_evalf(NULL, NULL, 4507 "\\_SB.PHS2", "vdd", 4508 TP_ACPI_VIDEO_570_PHS2CMD, 4509 status | TP_ACPI_VIDEO_570_PHS2SET); 4510 break; 4511 case TPACPI_VIDEO_770: 4512 autosw = video_autosw_get(); 4513 if (autosw < 0) 4514 return autosw; 4515 4516 res = video_autosw_set(1); 4517 if (res) 4518 return res; 4519 res = acpi_evalf(vid_handle, NULL, 4520 "ASWT", "vdd", status * 0x100, 0); 4521 if (!autosw && video_autosw_set(autosw)) { 4522 pr_err("video auto-switch left enabled due to error\n"); 4523 return -EIO; 4524 } 4525 break; 4526 case TPACPI_VIDEO_NEW: 4527 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4528 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4529 break; 4530 default: 4531 return -ENOSYS; 4532 } 4533 4534 return (res)? 0 : -EIO; 4535 } 4536 4537 static int video_autosw_get(void) 4538 { 4539 int autosw = 0; 4540 4541 switch (video_supported) { 4542 case TPACPI_VIDEO_570: 4543 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4544 return -EIO; 4545 break; 4546 case TPACPI_VIDEO_770: 4547 case TPACPI_VIDEO_NEW: 4548 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4549 return -EIO; 4550 break; 4551 default: 4552 return -ENOSYS; 4553 } 4554 4555 return autosw & 1; 4556 } 4557 4558 static int video_autosw_set(int enable) 4559 { 4560 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4561 return -EIO; 4562 return 0; 4563 } 4564 4565 static int video_outputsw_cycle(void) 4566 { 4567 int autosw = video_autosw_get(); 4568 int res; 4569 4570 if (autosw < 0) 4571 return autosw; 4572 4573 switch (video_supported) { 4574 case TPACPI_VIDEO_570: 4575 res = video_autosw_set(1); 4576 if (res) 4577 return res; 4578 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4579 break; 4580 case TPACPI_VIDEO_770: 4581 case TPACPI_VIDEO_NEW: 4582 res = video_autosw_set(1); 4583 if (res) 4584 return res; 4585 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4586 break; 4587 default: 4588 return -ENOSYS; 4589 } 4590 if (!autosw && video_autosw_set(autosw)) { 4591 pr_err("video auto-switch left enabled due to error\n"); 4592 return -EIO; 4593 } 4594 4595 return (res)? 0 : -EIO; 4596 } 4597 4598 static int video_expand_toggle(void) 4599 { 4600 switch (video_supported) { 4601 case TPACPI_VIDEO_570: 4602 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4603 0 : -EIO; 4604 case TPACPI_VIDEO_770: 4605 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4606 0 : -EIO; 4607 case TPACPI_VIDEO_NEW: 4608 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4609 0 : -EIO; 4610 default: 4611 return -ENOSYS; 4612 } 4613 /* not reached */ 4614 } 4615 4616 static int video_read(struct seq_file *m) 4617 { 4618 int status, autosw; 4619 4620 if (video_supported == TPACPI_VIDEO_NONE) { 4621 seq_printf(m, "status:\t\tnot supported\n"); 4622 return 0; 4623 } 4624 4625 /* Even reads can crash X.org, so... */ 4626 if (!capable(CAP_SYS_ADMIN)) 4627 return -EPERM; 4628 4629 status = video_outputsw_get(); 4630 if (status < 0) 4631 return status; 4632 4633 autosw = video_autosw_get(); 4634 if (autosw < 0) 4635 return autosw; 4636 4637 seq_printf(m, "status:\t\tsupported\n"); 4638 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4639 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4640 if (video_supported == TPACPI_VIDEO_NEW) 4641 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4642 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4643 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4644 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4645 if (video_supported == TPACPI_VIDEO_NEW) 4646 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4647 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4648 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4649 4650 return 0; 4651 } 4652 4653 static int video_write(char *buf) 4654 { 4655 char *cmd; 4656 int enable, disable, status; 4657 int res; 4658 4659 if (video_supported == TPACPI_VIDEO_NONE) 4660 return -ENODEV; 4661 4662 /* Even reads can crash X.org, let alone writes... */ 4663 if (!capable(CAP_SYS_ADMIN)) 4664 return -EPERM; 4665 4666 enable = 0; 4667 disable = 0; 4668 4669 while ((cmd = next_cmd(&buf))) { 4670 if (strlencmp(cmd, "lcd_enable") == 0) { 4671 enable |= TP_ACPI_VIDEO_S_LCD; 4672 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4673 disable |= TP_ACPI_VIDEO_S_LCD; 4674 } else if (strlencmp(cmd, "crt_enable") == 0) { 4675 enable |= TP_ACPI_VIDEO_S_CRT; 4676 } else if (strlencmp(cmd, "crt_disable") == 0) { 4677 disable |= TP_ACPI_VIDEO_S_CRT; 4678 } else if (video_supported == TPACPI_VIDEO_NEW && 4679 strlencmp(cmd, "dvi_enable") == 0) { 4680 enable |= TP_ACPI_VIDEO_S_DVI; 4681 } else if (video_supported == TPACPI_VIDEO_NEW && 4682 strlencmp(cmd, "dvi_disable") == 0) { 4683 disable |= TP_ACPI_VIDEO_S_DVI; 4684 } else if (strlencmp(cmd, "auto_enable") == 0) { 4685 res = video_autosw_set(1); 4686 if (res) 4687 return res; 4688 } else if (strlencmp(cmd, "auto_disable") == 0) { 4689 res = video_autosw_set(0); 4690 if (res) 4691 return res; 4692 } else if (strlencmp(cmd, "video_switch") == 0) { 4693 res = video_outputsw_cycle(); 4694 if (res) 4695 return res; 4696 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4697 res = video_expand_toggle(); 4698 if (res) 4699 return res; 4700 } else 4701 return -EINVAL; 4702 } 4703 4704 if (enable || disable) { 4705 status = video_outputsw_get(); 4706 if (status < 0) 4707 return status; 4708 res = video_outputsw_set((status & ~disable) | enable); 4709 if (res) 4710 return res; 4711 } 4712 4713 return 0; 4714 } 4715 4716 static struct ibm_struct video_driver_data = { 4717 .name = "video", 4718 .read = video_read, 4719 .write = video_write, 4720 .exit = video_exit, 4721 }; 4722 4723 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4724 4725 /************************************************************************* 4726 * Light (thinklight) subdriver 4727 */ 4728 4729 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4730 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4731 4732 static int light_get_status(void) 4733 { 4734 int status = 0; 4735 4736 if (tp_features.light_status) { 4737 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4738 return -EIO; 4739 return (!!status); 4740 } 4741 4742 return -ENXIO; 4743 } 4744 4745 static int light_set_status(int status) 4746 { 4747 int rc; 4748 4749 if (tp_features.light) { 4750 if (cmos_handle) { 4751 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4752 (status)? 4753 TP_CMOS_THINKLIGHT_ON : 4754 TP_CMOS_THINKLIGHT_OFF); 4755 } else { 4756 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4757 (status)? 1 : 0); 4758 } 4759 return (rc)? 0 : -EIO; 4760 } 4761 4762 return -ENXIO; 4763 } 4764 4765 static void light_set_status_worker(struct work_struct *work) 4766 { 4767 struct tpacpi_led_classdev *data = 4768 container_of(work, struct tpacpi_led_classdev, work); 4769 4770 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4771 light_set_status((data->new_state != TPACPI_LED_OFF)); 4772 } 4773 4774 static void light_sysfs_set(struct led_classdev *led_cdev, 4775 enum led_brightness brightness) 4776 { 4777 struct tpacpi_led_classdev *data = 4778 container_of(led_cdev, 4779 struct tpacpi_led_classdev, 4780 led_classdev); 4781 data->new_state = (brightness != LED_OFF) ? 4782 TPACPI_LED_ON : TPACPI_LED_OFF; 4783 queue_work(tpacpi_wq, &data->work); 4784 } 4785 4786 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4787 { 4788 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4789 } 4790 4791 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4792 .led_classdev = { 4793 .name = "tpacpi::thinklight", 4794 .brightness_set = &light_sysfs_set, 4795 .brightness_get = &light_sysfs_get, 4796 } 4797 }; 4798 4799 static int __init light_init(struct ibm_init_struct *iibm) 4800 { 4801 int rc; 4802 4803 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4804 4805 if (tpacpi_is_ibm()) { 4806 TPACPI_ACPIHANDLE_INIT(ledb); 4807 TPACPI_ACPIHANDLE_INIT(lght); 4808 } 4809 TPACPI_ACPIHANDLE_INIT(cmos); 4810 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4811 4812 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4813 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4814 4815 if (tp_features.light) 4816 /* light status not supported on 4817 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4818 tp_features.light_status = 4819 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4820 4821 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4822 str_supported(tp_features.light), 4823 str_supported(tp_features.light_status)); 4824 4825 if (!tp_features.light) 4826 return 1; 4827 4828 rc = led_classdev_register(&tpacpi_pdev->dev, 4829 &tpacpi_led_thinklight.led_classdev); 4830 4831 if (rc < 0) { 4832 tp_features.light = 0; 4833 tp_features.light_status = 0; 4834 } else { 4835 rc = 0; 4836 } 4837 4838 return rc; 4839 } 4840 4841 static void light_exit(void) 4842 { 4843 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4844 flush_workqueue(tpacpi_wq); 4845 } 4846 4847 static int light_read(struct seq_file *m) 4848 { 4849 int status; 4850 4851 if (!tp_features.light) { 4852 seq_printf(m, "status:\t\tnot supported\n"); 4853 } else if (!tp_features.light_status) { 4854 seq_printf(m, "status:\t\tunknown\n"); 4855 seq_printf(m, "commands:\ton, off\n"); 4856 } else { 4857 status = light_get_status(); 4858 if (status < 0) 4859 return status; 4860 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4861 seq_printf(m, "commands:\ton, off\n"); 4862 } 4863 4864 return 0; 4865 } 4866 4867 static int light_write(char *buf) 4868 { 4869 char *cmd; 4870 int newstatus = 0; 4871 4872 if (!tp_features.light) 4873 return -ENODEV; 4874 4875 while ((cmd = next_cmd(&buf))) { 4876 if (strlencmp(cmd, "on") == 0) { 4877 newstatus = 1; 4878 } else if (strlencmp(cmd, "off") == 0) { 4879 newstatus = 0; 4880 } else 4881 return -EINVAL; 4882 } 4883 4884 return light_set_status(newstatus); 4885 } 4886 4887 static struct ibm_struct light_driver_data = { 4888 .name = "light", 4889 .read = light_read, 4890 .write = light_write, 4891 .exit = light_exit, 4892 }; 4893 4894 /************************************************************************* 4895 * CMOS subdriver 4896 */ 4897 4898 /* sysfs cmos_command -------------------------------------------------- */ 4899 static ssize_t cmos_command_store(struct device *dev, 4900 struct device_attribute *attr, 4901 const char *buf, size_t count) 4902 { 4903 unsigned long cmos_cmd; 4904 int res; 4905 4906 if (parse_strtoul(buf, 21, &cmos_cmd)) 4907 return -EINVAL; 4908 4909 res = issue_thinkpad_cmos_command(cmos_cmd); 4910 return (res)? res : count; 4911 } 4912 4913 static struct device_attribute dev_attr_cmos_command = 4914 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4915 4916 /* --------------------------------------------------------------------- */ 4917 4918 static int __init cmos_init(struct ibm_init_struct *iibm) 4919 { 4920 int res; 4921 4922 vdbg_printk(TPACPI_DBG_INIT, 4923 "initializing cmos commands subdriver\n"); 4924 4925 TPACPI_ACPIHANDLE_INIT(cmos); 4926 4927 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4928 str_supported(cmos_handle != NULL)); 4929 4930 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4931 if (res) 4932 return res; 4933 4934 return (cmos_handle)? 0 : 1; 4935 } 4936 4937 static void cmos_exit(void) 4938 { 4939 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4940 } 4941 4942 static int cmos_read(struct seq_file *m) 4943 { 4944 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4945 R30, R31, T20-22, X20-21 */ 4946 if (!cmos_handle) 4947 seq_printf(m, "status:\t\tnot supported\n"); 4948 else { 4949 seq_printf(m, "status:\t\tsupported\n"); 4950 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4951 } 4952 4953 return 0; 4954 } 4955 4956 static int cmos_write(char *buf) 4957 { 4958 char *cmd; 4959 int cmos_cmd, res; 4960 4961 while ((cmd = next_cmd(&buf))) { 4962 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 4963 cmos_cmd >= 0 && cmos_cmd <= 21) { 4964 /* cmos_cmd set */ 4965 } else 4966 return -EINVAL; 4967 4968 res = issue_thinkpad_cmos_command(cmos_cmd); 4969 if (res) 4970 return res; 4971 } 4972 4973 return 0; 4974 } 4975 4976 static struct ibm_struct cmos_driver_data = { 4977 .name = "cmos", 4978 .read = cmos_read, 4979 .write = cmos_write, 4980 .exit = cmos_exit, 4981 }; 4982 4983 /************************************************************************* 4984 * LED subdriver 4985 */ 4986 4987 enum led_access_mode { 4988 TPACPI_LED_NONE = 0, 4989 TPACPI_LED_570, /* 570 */ 4990 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 4991 TPACPI_LED_NEW, /* all others */ 4992 }; 4993 4994 enum { /* For TPACPI_LED_OLD */ 4995 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 4996 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 4997 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 4998 }; 4999 5000 static enum led_access_mode led_supported; 5001 5002 static acpi_handle led_handle; 5003 5004 #define TPACPI_LED_NUMLEDS 16 5005 static struct tpacpi_led_classdev *tpacpi_leds; 5006 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5007 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5008 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5009 "tpacpi::power", 5010 "tpacpi:orange:batt", 5011 "tpacpi:green:batt", 5012 "tpacpi::dock_active", 5013 "tpacpi::bay_active", 5014 "tpacpi::dock_batt", 5015 "tpacpi::unknown_led", 5016 "tpacpi::standby", 5017 "tpacpi::dock_status1", 5018 "tpacpi::dock_status2", 5019 "tpacpi::unknown_led2", 5020 "tpacpi::unknown_led3", 5021 "tpacpi::thinkvantage", 5022 }; 5023 #define TPACPI_SAFE_LEDS 0x1081U 5024 5025 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5026 { 5027 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5028 return false; 5029 #else 5030 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5031 #endif 5032 } 5033 5034 static int led_get_status(const unsigned int led) 5035 { 5036 int status; 5037 enum led_status_t led_s; 5038 5039 switch (led_supported) { 5040 case TPACPI_LED_570: 5041 if (!acpi_evalf(ec_handle, 5042 &status, "GLED", "dd", 1 << led)) 5043 return -EIO; 5044 led_s = (status == 0)? 5045 TPACPI_LED_OFF : 5046 ((status == 1)? 5047 TPACPI_LED_ON : 5048 TPACPI_LED_BLINK); 5049 tpacpi_led_state_cache[led] = led_s; 5050 return led_s; 5051 default: 5052 return -ENXIO; 5053 } 5054 5055 /* not reached */ 5056 } 5057 5058 static int led_set_status(const unsigned int led, 5059 const enum led_status_t ledstatus) 5060 { 5061 /* off, on, blink. Index is led_status_t */ 5062 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5063 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5064 5065 int rc = 0; 5066 5067 switch (led_supported) { 5068 case TPACPI_LED_570: 5069 /* 570 */ 5070 if (unlikely(led > 7)) 5071 return -EINVAL; 5072 if (unlikely(tpacpi_is_led_restricted(led))) 5073 return -EPERM; 5074 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5075 (1 << led), led_sled_arg1[ledstatus])) 5076 rc = -EIO; 5077 break; 5078 case TPACPI_LED_OLD: 5079 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5080 if (unlikely(led > 7)) 5081 return -EINVAL; 5082 if (unlikely(tpacpi_is_led_restricted(led))) 5083 return -EPERM; 5084 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5085 if (rc >= 0) 5086 rc = ec_write(TPACPI_LED_EC_HLBL, 5087 (ledstatus == TPACPI_LED_BLINK) << led); 5088 if (rc >= 0) 5089 rc = ec_write(TPACPI_LED_EC_HLCL, 5090 (ledstatus != TPACPI_LED_OFF) << led); 5091 break; 5092 case TPACPI_LED_NEW: 5093 /* all others */ 5094 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5095 return -EINVAL; 5096 if (unlikely(tpacpi_is_led_restricted(led))) 5097 return -EPERM; 5098 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5099 led, led_led_arg1[ledstatus])) 5100 rc = -EIO; 5101 break; 5102 default: 5103 rc = -ENXIO; 5104 } 5105 5106 if (!rc) 5107 tpacpi_led_state_cache[led] = ledstatus; 5108 5109 return rc; 5110 } 5111 5112 static void led_set_status_worker(struct work_struct *work) 5113 { 5114 struct tpacpi_led_classdev *data = 5115 container_of(work, struct tpacpi_led_classdev, work); 5116 5117 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5118 led_set_status(data->led, data->new_state); 5119 } 5120 5121 static void led_sysfs_set(struct led_classdev *led_cdev, 5122 enum led_brightness brightness) 5123 { 5124 struct tpacpi_led_classdev *data = container_of(led_cdev, 5125 struct tpacpi_led_classdev, led_classdev); 5126 5127 if (brightness == LED_OFF) 5128 data->new_state = TPACPI_LED_OFF; 5129 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5130 data->new_state = TPACPI_LED_ON; 5131 else 5132 data->new_state = TPACPI_LED_BLINK; 5133 5134 queue_work(tpacpi_wq, &data->work); 5135 } 5136 5137 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5138 unsigned long *delay_on, unsigned long *delay_off) 5139 { 5140 struct tpacpi_led_classdev *data = container_of(led_cdev, 5141 struct tpacpi_led_classdev, led_classdev); 5142 5143 /* Can we choose the flash rate? */ 5144 if (*delay_on == 0 && *delay_off == 0) { 5145 /* yes. set them to the hardware blink rate (1 Hz) */ 5146 *delay_on = 500; /* ms */ 5147 *delay_off = 500; /* ms */ 5148 } else if ((*delay_on != 500) || (*delay_off != 500)) 5149 return -EINVAL; 5150 5151 data->new_state = TPACPI_LED_BLINK; 5152 queue_work(tpacpi_wq, &data->work); 5153 5154 return 0; 5155 } 5156 5157 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5158 { 5159 int rc; 5160 5161 struct tpacpi_led_classdev *data = container_of(led_cdev, 5162 struct tpacpi_led_classdev, led_classdev); 5163 5164 rc = led_get_status(data->led); 5165 5166 if (rc == TPACPI_LED_OFF || rc < 0) 5167 rc = LED_OFF; /* no error handling in led class :( */ 5168 else 5169 rc = LED_FULL; 5170 5171 return rc; 5172 } 5173 5174 static void led_exit(void) 5175 { 5176 unsigned int i; 5177 5178 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5179 if (tpacpi_leds[i].led_classdev.name) 5180 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5181 } 5182 5183 flush_workqueue(tpacpi_wq); 5184 kfree(tpacpi_leds); 5185 } 5186 5187 static int __init tpacpi_init_led(unsigned int led) 5188 { 5189 int rc; 5190 5191 tpacpi_leds[led].led = led; 5192 5193 /* LEDs with no name don't get registered */ 5194 if (!tpacpi_led_names[led]) 5195 return 0; 5196 5197 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5198 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5199 if (led_supported == TPACPI_LED_570) 5200 tpacpi_leds[led].led_classdev.brightness_get = 5201 &led_sysfs_get; 5202 5203 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5204 5205 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5206 5207 rc = led_classdev_register(&tpacpi_pdev->dev, 5208 &tpacpi_leds[led].led_classdev); 5209 if (rc < 0) 5210 tpacpi_leds[led].led_classdev.name = NULL; 5211 5212 return rc; 5213 } 5214 5215 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5216 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5217 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5218 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5219 5220 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5221 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5222 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5223 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5224 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5225 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5226 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5227 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5228 5229 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5230 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5231 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5232 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5233 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5234 5235 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5236 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5237 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5238 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5239 5240 /* (1) - may have excess leds enabled on MSB */ 5241 5242 /* Defaults (order matters, keep last, don't reorder!) */ 5243 { /* Lenovo */ 5244 .vendor = PCI_VENDOR_ID_LENOVO, 5245 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5246 .quirks = 0x1fffU, 5247 }, 5248 { /* IBM ThinkPads with no EC version string */ 5249 .vendor = PCI_VENDOR_ID_IBM, 5250 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5251 .quirks = 0x00ffU, 5252 }, 5253 { /* IBM ThinkPads with EC version string */ 5254 .vendor = PCI_VENDOR_ID_IBM, 5255 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5256 .quirks = 0x00bfU, 5257 }, 5258 }; 5259 5260 #undef TPACPI_LEDQ_IBM 5261 #undef TPACPI_LEDQ_LNV 5262 5263 static enum led_access_mode __init led_init_detect_mode(void) 5264 { 5265 acpi_status status; 5266 5267 if (tpacpi_is_ibm()) { 5268 /* 570 */ 5269 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5270 if (ACPI_SUCCESS(status)) 5271 return TPACPI_LED_570; 5272 5273 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5274 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5275 if (ACPI_SUCCESS(status)) 5276 return TPACPI_LED_OLD; 5277 } 5278 5279 /* most others */ 5280 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5281 if (ACPI_SUCCESS(status)) 5282 return TPACPI_LED_NEW; 5283 5284 /* R30, R31, and unknown firmwares */ 5285 led_handle = NULL; 5286 return TPACPI_LED_NONE; 5287 } 5288 5289 static int __init led_init(struct ibm_init_struct *iibm) 5290 { 5291 unsigned int i; 5292 int rc; 5293 unsigned long useful_leds; 5294 5295 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5296 5297 led_supported = led_init_detect_mode(); 5298 5299 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5300 str_supported(led_supported), led_supported); 5301 5302 if (led_supported == TPACPI_LED_NONE) 5303 return 1; 5304 5305 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5306 GFP_KERNEL); 5307 if (!tpacpi_leds) { 5308 pr_err("Out of memory for LED data\n"); 5309 return -ENOMEM; 5310 } 5311 5312 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5313 ARRAY_SIZE(led_useful_qtable)); 5314 5315 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5316 if (!tpacpi_is_led_restricted(i) && 5317 test_bit(i, &useful_leds)) { 5318 rc = tpacpi_init_led(i); 5319 if (rc < 0) { 5320 led_exit(); 5321 return rc; 5322 } 5323 } 5324 } 5325 5326 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5327 pr_notice("warning: userspace override of important " 5328 "firmware LEDs is enabled\n"); 5329 #endif 5330 return 0; 5331 } 5332 5333 #define str_led_status(s) \ 5334 ((s) == TPACPI_LED_OFF ? "off" : \ 5335 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5336 5337 static int led_read(struct seq_file *m) 5338 { 5339 if (!led_supported) { 5340 seq_printf(m, "status:\t\tnot supported\n"); 5341 return 0; 5342 } 5343 seq_printf(m, "status:\t\tsupported\n"); 5344 5345 if (led_supported == TPACPI_LED_570) { 5346 /* 570 */ 5347 int i, status; 5348 for (i = 0; i < 8; i++) { 5349 status = led_get_status(i); 5350 if (status < 0) 5351 return -EIO; 5352 seq_printf(m, "%d:\t\t%s\n", 5353 i, str_led_status(status)); 5354 } 5355 } 5356 5357 seq_printf(m, "commands:\t" 5358 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5359 5360 return 0; 5361 } 5362 5363 static int led_write(char *buf) 5364 { 5365 char *cmd; 5366 int led, rc; 5367 enum led_status_t s; 5368 5369 if (!led_supported) 5370 return -ENODEV; 5371 5372 while ((cmd = next_cmd(&buf))) { 5373 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5374 return -EINVAL; 5375 5376 if (strstr(cmd, "off")) { 5377 s = TPACPI_LED_OFF; 5378 } else if (strstr(cmd, "on")) { 5379 s = TPACPI_LED_ON; 5380 } else if (strstr(cmd, "blink")) { 5381 s = TPACPI_LED_BLINK; 5382 } else { 5383 return -EINVAL; 5384 } 5385 5386 rc = led_set_status(led, s); 5387 if (rc < 0) 5388 return rc; 5389 } 5390 5391 return 0; 5392 } 5393 5394 static struct ibm_struct led_driver_data = { 5395 .name = "led", 5396 .read = led_read, 5397 .write = led_write, 5398 .exit = led_exit, 5399 }; 5400 5401 /************************************************************************* 5402 * Beep subdriver 5403 */ 5404 5405 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5406 5407 #define TPACPI_BEEP_Q1 0x0001 5408 5409 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5410 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5411 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5412 }; 5413 5414 static int __init beep_init(struct ibm_init_struct *iibm) 5415 { 5416 unsigned long quirks; 5417 5418 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5419 5420 TPACPI_ACPIHANDLE_INIT(beep); 5421 5422 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5423 str_supported(beep_handle != NULL)); 5424 5425 quirks = tpacpi_check_quirks(beep_quirk_table, 5426 ARRAY_SIZE(beep_quirk_table)); 5427 5428 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5429 5430 return (beep_handle)? 0 : 1; 5431 } 5432 5433 static int beep_read(struct seq_file *m) 5434 { 5435 if (!beep_handle) 5436 seq_printf(m, "status:\t\tnot supported\n"); 5437 else { 5438 seq_printf(m, "status:\t\tsupported\n"); 5439 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5440 } 5441 5442 return 0; 5443 } 5444 5445 static int beep_write(char *buf) 5446 { 5447 char *cmd; 5448 int beep_cmd; 5449 5450 if (!beep_handle) 5451 return -ENODEV; 5452 5453 while ((cmd = next_cmd(&buf))) { 5454 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5455 beep_cmd >= 0 && beep_cmd <= 17) { 5456 /* beep_cmd set */ 5457 } else 5458 return -EINVAL; 5459 if (tp_features.beep_needs_two_args) { 5460 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5461 beep_cmd, 0)) 5462 return -EIO; 5463 } else { 5464 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5465 beep_cmd)) 5466 return -EIO; 5467 } 5468 } 5469 5470 return 0; 5471 } 5472 5473 static struct ibm_struct beep_driver_data = { 5474 .name = "beep", 5475 .read = beep_read, 5476 .write = beep_write, 5477 }; 5478 5479 /************************************************************************* 5480 * Thermal subdriver 5481 */ 5482 5483 enum thermal_access_mode { 5484 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5485 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5486 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5487 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5488 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5489 }; 5490 5491 enum { /* TPACPI_THERMAL_TPEC_* */ 5492 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5493 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5494 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5495 5496 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5497 }; 5498 5499 5500 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5501 struct ibm_thermal_sensors_struct { 5502 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5503 }; 5504 5505 static enum thermal_access_mode thermal_read_mode; 5506 5507 /* idx is zero-based */ 5508 static int thermal_get_sensor(int idx, s32 *value) 5509 { 5510 int t; 5511 s8 tmp; 5512 char tmpi[5]; 5513 5514 t = TP_EC_THERMAL_TMP0; 5515 5516 switch (thermal_read_mode) { 5517 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5518 case TPACPI_THERMAL_TPEC_16: 5519 if (idx >= 8 && idx <= 15) { 5520 t = TP_EC_THERMAL_TMP8; 5521 idx -= 8; 5522 } 5523 /* fallthrough */ 5524 #endif 5525 case TPACPI_THERMAL_TPEC_8: 5526 if (idx <= 7) { 5527 if (!acpi_ec_read(t + idx, &tmp)) 5528 return -EIO; 5529 *value = tmp * 1000; 5530 return 0; 5531 } 5532 break; 5533 5534 case TPACPI_THERMAL_ACPI_UPDT: 5535 if (idx <= 7) { 5536 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5537 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5538 return -EIO; 5539 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5540 return -EIO; 5541 *value = (t - 2732) * 100; 5542 return 0; 5543 } 5544 break; 5545 5546 case TPACPI_THERMAL_ACPI_TMP07: 5547 if (idx <= 7) { 5548 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5549 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5550 return -EIO; 5551 if (t > 127 || t < -127) 5552 t = TP_EC_THERMAL_TMP_NA; 5553 *value = t * 1000; 5554 return 0; 5555 } 5556 break; 5557 5558 case TPACPI_THERMAL_NONE: 5559 default: 5560 return -ENOSYS; 5561 } 5562 5563 return -EINVAL; 5564 } 5565 5566 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5567 { 5568 int res, i; 5569 int n; 5570 5571 n = 8; 5572 i = 0; 5573 5574 if (!s) 5575 return -EINVAL; 5576 5577 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5578 n = 16; 5579 5580 for (i = 0 ; i < n; i++) { 5581 res = thermal_get_sensor(i, &s->temp[i]); 5582 if (res) 5583 return res; 5584 } 5585 5586 return n; 5587 } 5588 5589 static void thermal_dump_all_sensors(void) 5590 { 5591 int n, i; 5592 struct ibm_thermal_sensors_struct t; 5593 5594 n = thermal_get_sensors(&t); 5595 if (n <= 0) 5596 return; 5597 5598 pr_notice("temperatures (Celsius):"); 5599 5600 for (i = 0; i < n; i++) { 5601 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5602 pr_cont(" %d", (int)(t.temp[i] / 1000)); 5603 else 5604 pr_cont(" N/A"); 5605 } 5606 5607 pr_cont("\n"); 5608 } 5609 5610 /* sysfs temp##_input -------------------------------------------------- */ 5611 5612 static ssize_t thermal_temp_input_show(struct device *dev, 5613 struct device_attribute *attr, 5614 char *buf) 5615 { 5616 struct sensor_device_attribute *sensor_attr = 5617 to_sensor_dev_attr(attr); 5618 int idx = sensor_attr->index; 5619 s32 value; 5620 int res; 5621 5622 res = thermal_get_sensor(idx, &value); 5623 if (res) 5624 return res; 5625 if (value == TPACPI_THERMAL_SENSOR_NA) 5626 return -ENXIO; 5627 5628 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5629 } 5630 5631 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5632 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5633 thermal_temp_input_show, NULL, _idxB) 5634 5635 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5636 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5637 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5638 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5639 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5640 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5641 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5642 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5643 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5644 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5645 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5646 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5647 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5648 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5649 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5650 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5651 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5652 }; 5653 5654 #define THERMAL_ATTRS(X) \ 5655 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5656 5657 static struct attribute *thermal_temp_input_attr[] = { 5658 THERMAL_ATTRS(8), 5659 THERMAL_ATTRS(9), 5660 THERMAL_ATTRS(10), 5661 THERMAL_ATTRS(11), 5662 THERMAL_ATTRS(12), 5663 THERMAL_ATTRS(13), 5664 THERMAL_ATTRS(14), 5665 THERMAL_ATTRS(15), 5666 THERMAL_ATTRS(0), 5667 THERMAL_ATTRS(1), 5668 THERMAL_ATTRS(2), 5669 THERMAL_ATTRS(3), 5670 THERMAL_ATTRS(4), 5671 THERMAL_ATTRS(5), 5672 THERMAL_ATTRS(6), 5673 THERMAL_ATTRS(7), 5674 NULL 5675 }; 5676 5677 static const struct attribute_group thermal_temp_input16_group = { 5678 .attrs = thermal_temp_input_attr 5679 }; 5680 5681 static const struct attribute_group thermal_temp_input8_group = { 5682 .attrs = &thermal_temp_input_attr[8] 5683 }; 5684 5685 #undef THERMAL_SENSOR_ATTR_TEMP 5686 #undef THERMAL_ATTRS 5687 5688 /* --------------------------------------------------------------------- */ 5689 5690 static int __init thermal_init(struct ibm_init_struct *iibm) 5691 { 5692 u8 t, ta1, ta2; 5693 int i; 5694 int acpi_tmp7; 5695 int res; 5696 5697 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5698 5699 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5700 5701 if (thinkpad_id.ec_model) { 5702 /* 5703 * Direct EC access mode: sensors at registers 5704 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5705 * non-implemented, thermal sensors return 0x80 when 5706 * not available 5707 */ 5708 5709 ta1 = ta2 = 0; 5710 for (i = 0; i < 8; i++) { 5711 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5712 ta1 |= t; 5713 } else { 5714 ta1 = 0; 5715 break; 5716 } 5717 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5718 ta2 |= t; 5719 } else { 5720 ta1 = 0; 5721 break; 5722 } 5723 } 5724 if (ta1 == 0) { 5725 /* This is sheer paranoia, but we handle it anyway */ 5726 if (acpi_tmp7) { 5727 pr_err("ThinkPad ACPI EC access misbehaving, " 5728 "falling back to ACPI TMPx access " 5729 "mode\n"); 5730 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5731 } else { 5732 pr_err("ThinkPad ACPI EC access misbehaving, " 5733 "disabling thermal sensors access\n"); 5734 thermal_read_mode = TPACPI_THERMAL_NONE; 5735 } 5736 } else { 5737 thermal_read_mode = 5738 (ta2 != 0) ? 5739 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5740 } 5741 } else if (acpi_tmp7) { 5742 if (tpacpi_is_ibm() && 5743 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5744 /* 600e/x, 770e, 770x */ 5745 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5746 } else { 5747 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5748 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5749 } 5750 } else { 5751 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5752 thermal_read_mode = TPACPI_THERMAL_NONE; 5753 } 5754 5755 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5756 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5757 thermal_read_mode); 5758 5759 switch (thermal_read_mode) { 5760 case TPACPI_THERMAL_TPEC_16: 5761 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5762 &thermal_temp_input16_group); 5763 if (res) 5764 return res; 5765 break; 5766 case TPACPI_THERMAL_TPEC_8: 5767 case TPACPI_THERMAL_ACPI_TMP07: 5768 case TPACPI_THERMAL_ACPI_UPDT: 5769 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5770 &thermal_temp_input8_group); 5771 if (res) 5772 return res; 5773 break; 5774 case TPACPI_THERMAL_NONE: 5775 default: 5776 return 1; 5777 } 5778 5779 return 0; 5780 } 5781 5782 static void thermal_exit(void) 5783 { 5784 switch (thermal_read_mode) { 5785 case TPACPI_THERMAL_TPEC_16: 5786 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5787 &thermal_temp_input16_group); 5788 break; 5789 case TPACPI_THERMAL_TPEC_8: 5790 case TPACPI_THERMAL_ACPI_TMP07: 5791 case TPACPI_THERMAL_ACPI_UPDT: 5792 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5793 &thermal_temp_input8_group); 5794 break; 5795 case TPACPI_THERMAL_NONE: 5796 default: 5797 break; 5798 } 5799 } 5800 5801 static int thermal_read(struct seq_file *m) 5802 { 5803 int n, i; 5804 struct ibm_thermal_sensors_struct t; 5805 5806 n = thermal_get_sensors(&t); 5807 if (unlikely(n < 0)) 5808 return n; 5809 5810 seq_printf(m, "temperatures:\t"); 5811 5812 if (n > 0) { 5813 for (i = 0; i < (n - 1); i++) 5814 seq_printf(m, "%d ", t.temp[i] / 1000); 5815 seq_printf(m, "%d\n", t.temp[i] / 1000); 5816 } else 5817 seq_printf(m, "not supported\n"); 5818 5819 return 0; 5820 } 5821 5822 static struct ibm_struct thermal_driver_data = { 5823 .name = "thermal", 5824 .read = thermal_read, 5825 .exit = thermal_exit, 5826 }; 5827 5828 /************************************************************************* 5829 * Backlight/brightness subdriver 5830 */ 5831 5832 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5833 5834 /* 5835 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5836 * CMOS NVRAM byte 0x5E, bits 0-3. 5837 * 5838 * EC HBRV (0x31) has the following layout 5839 * Bit 7: unknown function 5840 * Bit 6: unknown function 5841 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5842 * Bit 4: must be set to zero to avoid problems 5843 * Bit 3-0: backlight brightness level 5844 * 5845 * brightness_get_raw returns status data in the HBRV layout 5846 * 5847 * WARNING: The X61 has been verified to use HBRV for something else, so 5848 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5849 * testing on the very early *60 Lenovo models... 5850 */ 5851 5852 enum { 5853 TP_EC_BACKLIGHT = 0x31, 5854 5855 /* TP_EC_BACKLIGHT bitmasks */ 5856 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5857 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5858 TP_EC_BACKLIGHT_MAPSW = 0x20, 5859 }; 5860 5861 enum tpacpi_brightness_access_mode { 5862 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5863 TPACPI_BRGHT_MODE_EC, /* EC control */ 5864 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5865 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5866 TPACPI_BRGHT_MODE_MAX 5867 }; 5868 5869 static struct backlight_device *ibm_backlight_device; 5870 5871 static enum tpacpi_brightness_access_mode brightness_mode = 5872 TPACPI_BRGHT_MODE_MAX; 5873 5874 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5875 5876 static struct mutex brightness_mutex; 5877 5878 /* NVRAM brightness access, 5879 * call with brightness_mutex held! */ 5880 static unsigned int tpacpi_brightness_nvram_get(void) 5881 { 5882 u8 lnvram; 5883 5884 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5885 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5886 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5887 lnvram &= bright_maxlvl; 5888 5889 return lnvram; 5890 } 5891 5892 static void tpacpi_brightness_checkpoint_nvram(void) 5893 { 5894 u8 lec = 0; 5895 u8 b_nvram; 5896 5897 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5898 return; 5899 5900 vdbg_printk(TPACPI_DBG_BRGHT, 5901 "trying to checkpoint backlight level to NVRAM...\n"); 5902 5903 if (mutex_lock_killable(&brightness_mutex) < 0) 5904 return; 5905 5906 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5907 goto unlock; 5908 lec &= TP_EC_BACKLIGHT_LVLMSK; 5909 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5910 5911 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5912 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5913 /* NVRAM needs update */ 5914 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5915 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5916 b_nvram |= lec; 5917 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5918 dbg_printk(TPACPI_DBG_BRGHT, 5919 "updated NVRAM backlight level to %u (0x%02x)\n", 5920 (unsigned int) lec, (unsigned int) b_nvram); 5921 } else 5922 vdbg_printk(TPACPI_DBG_BRGHT, 5923 "NVRAM backlight level already is %u (0x%02x)\n", 5924 (unsigned int) lec, (unsigned int) b_nvram); 5925 5926 unlock: 5927 mutex_unlock(&brightness_mutex); 5928 } 5929 5930 5931 /* call with brightness_mutex held! */ 5932 static int tpacpi_brightness_get_raw(int *status) 5933 { 5934 u8 lec = 0; 5935 5936 switch (brightness_mode) { 5937 case TPACPI_BRGHT_MODE_UCMS_STEP: 5938 *status = tpacpi_brightness_nvram_get(); 5939 return 0; 5940 case TPACPI_BRGHT_MODE_EC: 5941 case TPACPI_BRGHT_MODE_ECNVRAM: 5942 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5943 return -EIO; 5944 *status = lec; 5945 return 0; 5946 default: 5947 return -ENXIO; 5948 } 5949 } 5950 5951 /* call with brightness_mutex held! */ 5952 /* do NOT call with illegal backlight level value */ 5953 static int tpacpi_brightness_set_ec(unsigned int value) 5954 { 5955 u8 lec = 0; 5956 5957 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5958 return -EIO; 5959 5960 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 5961 (lec & TP_EC_BACKLIGHT_CMDMSK) | 5962 (value & TP_EC_BACKLIGHT_LVLMSK)))) 5963 return -EIO; 5964 5965 return 0; 5966 } 5967 5968 /* call with brightness_mutex held! */ 5969 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 5970 { 5971 int cmos_cmd, inc; 5972 unsigned int current_value, i; 5973 5974 current_value = tpacpi_brightness_nvram_get(); 5975 5976 if (value == current_value) 5977 return 0; 5978 5979 cmos_cmd = (value > current_value) ? 5980 TP_CMOS_BRIGHTNESS_UP : 5981 TP_CMOS_BRIGHTNESS_DOWN; 5982 inc = (value > current_value) ? 1 : -1; 5983 5984 for (i = current_value; i != value; i += inc) 5985 if (issue_thinkpad_cmos_command(cmos_cmd)) 5986 return -EIO; 5987 5988 return 0; 5989 } 5990 5991 /* May return EINTR which can always be mapped to ERESTARTSYS */ 5992 static int brightness_set(unsigned int value) 5993 { 5994 int res; 5995 5996 if (value > bright_maxlvl || value < 0) 5997 return -EINVAL; 5998 5999 vdbg_printk(TPACPI_DBG_BRGHT, 6000 "set backlight level to %d\n", value); 6001 6002 res = mutex_lock_killable(&brightness_mutex); 6003 if (res < 0) 6004 return res; 6005 6006 switch (brightness_mode) { 6007 case TPACPI_BRGHT_MODE_EC: 6008 case TPACPI_BRGHT_MODE_ECNVRAM: 6009 res = tpacpi_brightness_set_ec(value); 6010 break; 6011 case TPACPI_BRGHT_MODE_UCMS_STEP: 6012 res = tpacpi_brightness_set_ucmsstep(value); 6013 break; 6014 default: 6015 res = -ENXIO; 6016 } 6017 6018 mutex_unlock(&brightness_mutex); 6019 return res; 6020 } 6021 6022 /* sysfs backlight class ----------------------------------------------- */ 6023 6024 static int brightness_update_status(struct backlight_device *bd) 6025 { 6026 unsigned int level = 6027 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6028 bd->props.power == FB_BLANK_UNBLANK) ? 6029 bd->props.brightness : 0; 6030 6031 dbg_printk(TPACPI_DBG_BRGHT, 6032 "backlight: attempt to set level to %d\n", 6033 level); 6034 6035 /* it is the backlight class's job (caller) to handle 6036 * EINTR and other errors properly */ 6037 return brightness_set(level); 6038 } 6039 6040 static int brightness_get(struct backlight_device *bd) 6041 { 6042 int status, res; 6043 6044 res = mutex_lock_killable(&brightness_mutex); 6045 if (res < 0) 6046 return 0; 6047 6048 res = tpacpi_brightness_get_raw(&status); 6049 6050 mutex_unlock(&brightness_mutex); 6051 6052 if (res < 0) 6053 return 0; 6054 6055 return status & TP_EC_BACKLIGHT_LVLMSK; 6056 } 6057 6058 static void tpacpi_brightness_notify_change(void) 6059 { 6060 backlight_force_update(ibm_backlight_device, 6061 BACKLIGHT_UPDATE_HOTKEY); 6062 } 6063 6064 static const struct backlight_ops ibm_backlight_data = { 6065 .get_brightness = brightness_get, 6066 .update_status = brightness_update_status, 6067 }; 6068 6069 /* --------------------------------------------------------------------- */ 6070 6071 /* 6072 * Call _BCL method of video device. On some ThinkPads this will 6073 * switch the firmware to the ACPI brightness control mode. 6074 */ 6075 6076 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6077 { 6078 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6079 union acpi_object *obj; 6080 int rc; 6081 6082 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) { 6083 obj = (union acpi_object *)buffer.pointer; 6084 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6085 pr_err("Unknown _BCL data, please report this to %s\n", 6086 TPACPI_MAIL); 6087 rc = 0; 6088 } else { 6089 rc = obj->package.count; 6090 } 6091 } else { 6092 return 0; 6093 } 6094 6095 kfree(buffer.pointer); 6096 return rc; 6097 } 6098 6099 6100 /* 6101 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6102 */ 6103 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6104 { 6105 acpi_handle video_device; 6106 int bcl_levels = 0; 6107 6108 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device); 6109 if (video_device) 6110 bcl_levels = tpacpi_query_bcl_levels(video_device); 6111 6112 tp_features.bright_acpimode = (bcl_levels > 0); 6113 6114 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6115 } 6116 6117 /* 6118 * These are only useful for models that have only one possibility 6119 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6120 * these quirks. 6121 */ 6122 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6123 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6124 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6125 6126 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6127 /* Models with ATI GPUs known to require ECNVRAM mode */ 6128 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6129 6130 /* Models with ATI GPUs that can use ECNVRAM */ 6131 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6132 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6133 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6134 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6135 6136 /* Models with Intel Extreme Graphics 2 */ 6137 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6138 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6139 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6140 6141 /* Models with Intel GMA900 */ 6142 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6143 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6144 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6145 }; 6146 6147 /* 6148 * Returns < 0 for error, otherwise sets tp_features.bright_* 6149 * and bright_maxlvl. 6150 */ 6151 static void __init tpacpi_detect_brightness_capabilities(void) 6152 { 6153 unsigned int b; 6154 6155 vdbg_printk(TPACPI_DBG_INIT, 6156 "detecting firmware brightness interface capabilities\n"); 6157 6158 /* we could run a quirks check here (same table used by 6159 * brightness_init) if needed */ 6160 6161 /* 6162 * We always attempt to detect acpi support, so as to switch 6163 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6164 * going to publish a backlight interface 6165 */ 6166 b = tpacpi_check_std_acpi_brightness_support(); 6167 switch (b) { 6168 case 16: 6169 bright_maxlvl = 15; 6170 pr_info("detected a 16-level brightness capable ThinkPad\n"); 6171 break; 6172 case 8: 6173 case 0: 6174 bright_maxlvl = 7; 6175 pr_info("detected a 8-level brightness capable ThinkPad\n"); 6176 break; 6177 default: 6178 pr_err("Unsupported brightness interface, " 6179 "please contact %s\n", TPACPI_MAIL); 6180 tp_features.bright_unkfw = 1; 6181 bright_maxlvl = b - 1; 6182 } 6183 } 6184 6185 static int __init brightness_init(struct ibm_init_struct *iibm) 6186 { 6187 struct backlight_properties props; 6188 int b; 6189 unsigned long quirks; 6190 6191 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6192 6193 mutex_init(&brightness_mutex); 6194 6195 quirks = tpacpi_check_quirks(brightness_quirk_table, 6196 ARRAY_SIZE(brightness_quirk_table)); 6197 6198 /* tpacpi_detect_brightness_capabilities() must have run already */ 6199 6200 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6201 if (tp_features.bright_unkfw) 6202 return 1; 6203 6204 if (!brightness_enable) { 6205 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6206 "brightness support disabled by " 6207 "module parameter\n"); 6208 return 1; 6209 } 6210 6211 if (acpi_video_backlight_support()) { 6212 if (brightness_enable > 1) { 6213 pr_info("Standard ACPI backlight interface " 6214 "available, not loading native one\n"); 6215 return 1; 6216 } else if (brightness_enable == 1) { 6217 pr_warn("Cannot enable backlight brightness support, " 6218 "ACPI is already handling it. Refer to the " 6219 "acpi_backlight kernel parameter.\n"); 6220 return 1; 6221 } 6222 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6223 pr_notice("Standard ACPI backlight interface not " 6224 "available, thinkpad_acpi native " 6225 "brightness control enabled\n"); 6226 } 6227 6228 /* 6229 * Check for module parameter bogosity, note that we 6230 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6231 * able to detect "unspecified" 6232 */ 6233 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6234 return -EINVAL; 6235 6236 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6237 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6238 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6239 if (quirks & TPACPI_BRGHT_Q_EC) 6240 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6241 else 6242 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6243 6244 dbg_printk(TPACPI_DBG_BRGHT, 6245 "driver auto-selected brightness_mode=%d\n", 6246 brightness_mode); 6247 } 6248 6249 /* Safety */ 6250 if (!tpacpi_is_ibm() && 6251 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6252 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6253 return -EINVAL; 6254 6255 if (tpacpi_brightness_get_raw(&b) < 0) 6256 return 1; 6257 6258 memset(&props, 0, sizeof(struct backlight_properties)); 6259 props.type = BACKLIGHT_PLATFORM; 6260 props.max_brightness = bright_maxlvl; 6261 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6262 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6263 NULL, NULL, 6264 &ibm_backlight_data, 6265 &props); 6266 if (IS_ERR(ibm_backlight_device)) { 6267 int rc = PTR_ERR(ibm_backlight_device); 6268 ibm_backlight_device = NULL; 6269 pr_err("Could not register backlight device\n"); 6270 return rc; 6271 } 6272 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6273 "brightness is supported\n"); 6274 6275 if (quirks & TPACPI_BRGHT_Q_ASK) { 6276 pr_notice("brightness: will use unverified default: " 6277 "brightness_mode=%d\n", brightness_mode); 6278 pr_notice("brightness: please report to %s whether it works well " 6279 "or not on your ThinkPad\n", TPACPI_MAIL); 6280 } 6281 6282 /* Added by mistake in early 2007. Probably useless, but it could 6283 * be working around some unknown firmware problem where the value 6284 * read at startup doesn't match the real hardware state... so leave 6285 * it in place just in case */ 6286 backlight_update_status(ibm_backlight_device); 6287 6288 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6289 "brightness: registering brightness hotkeys " 6290 "as change notification\n"); 6291 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6292 | TP_ACPI_HKEY_BRGHTUP_MASK 6293 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6294 return 0; 6295 } 6296 6297 static void brightness_suspend(void) 6298 { 6299 tpacpi_brightness_checkpoint_nvram(); 6300 } 6301 6302 static void brightness_shutdown(void) 6303 { 6304 tpacpi_brightness_checkpoint_nvram(); 6305 } 6306 6307 static void brightness_exit(void) 6308 { 6309 if (ibm_backlight_device) { 6310 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6311 "calling backlight_device_unregister()\n"); 6312 backlight_device_unregister(ibm_backlight_device); 6313 } 6314 6315 tpacpi_brightness_checkpoint_nvram(); 6316 } 6317 6318 static int brightness_read(struct seq_file *m) 6319 { 6320 int level; 6321 6322 level = brightness_get(NULL); 6323 if (level < 0) { 6324 seq_printf(m, "level:\t\tunreadable\n"); 6325 } else { 6326 seq_printf(m, "level:\t\t%d\n", level); 6327 seq_printf(m, "commands:\tup, down\n"); 6328 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6329 bright_maxlvl); 6330 } 6331 6332 return 0; 6333 } 6334 6335 static int brightness_write(char *buf) 6336 { 6337 int level; 6338 int rc; 6339 char *cmd; 6340 6341 level = brightness_get(NULL); 6342 if (level < 0) 6343 return level; 6344 6345 while ((cmd = next_cmd(&buf))) { 6346 if (strlencmp(cmd, "up") == 0) { 6347 if (level < bright_maxlvl) 6348 level++; 6349 } else if (strlencmp(cmd, "down") == 0) { 6350 if (level > 0) 6351 level--; 6352 } else if (sscanf(cmd, "level %d", &level) == 1 && 6353 level >= 0 && level <= bright_maxlvl) { 6354 /* new level set */ 6355 } else 6356 return -EINVAL; 6357 } 6358 6359 tpacpi_disclose_usertask("procfs brightness", 6360 "set level to %d\n", level); 6361 6362 /* 6363 * Now we know what the final level should be, so we try to set it. 6364 * Doing it this way makes the syscall restartable in case of EINTR 6365 */ 6366 rc = brightness_set(level); 6367 if (!rc && ibm_backlight_device) 6368 backlight_force_update(ibm_backlight_device, 6369 BACKLIGHT_UPDATE_SYSFS); 6370 return (rc == -EINTR)? -ERESTARTSYS : rc; 6371 } 6372 6373 static struct ibm_struct brightness_driver_data = { 6374 .name = "brightness", 6375 .read = brightness_read, 6376 .write = brightness_write, 6377 .exit = brightness_exit, 6378 .suspend = brightness_suspend, 6379 .shutdown = brightness_shutdown, 6380 }; 6381 6382 /************************************************************************* 6383 * Volume subdriver 6384 */ 6385 6386 /* 6387 * IBM ThinkPads have a simple volume controller with MUTE gating. 6388 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6389 * 6390 * Since the *61 series (and probably also the later *60 series), Lenovo 6391 * ThinkPads only implement the MUTE gate. 6392 * 6393 * EC register 0x30 6394 * Bit 6: MUTE (1 mutes sound) 6395 * Bit 3-0: Volume 6396 * Other bits should be zero as far as we know. 6397 * 6398 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6399 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6400 * such as bit 7 which is used to detect repeated presses of MUTE, 6401 * and we leave them unchanged. 6402 */ 6403 6404 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6405 6406 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6407 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6408 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6409 6410 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */ 6411 static char *alsa_id = "ThinkPadEC"; 6412 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6413 6414 struct tpacpi_alsa_data { 6415 struct snd_card *card; 6416 struct snd_ctl_elem_id *ctl_mute_id; 6417 struct snd_ctl_elem_id *ctl_vol_id; 6418 }; 6419 6420 static struct snd_card *alsa_card; 6421 6422 enum { 6423 TP_EC_AUDIO = 0x30, 6424 6425 /* TP_EC_AUDIO bits */ 6426 TP_EC_AUDIO_MUTESW = 6, 6427 6428 /* TP_EC_AUDIO bitmasks */ 6429 TP_EC_AUDIO_LVL_MSK = 0x0F, 6430 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6431 6432 /* Maximum volume */ 6433 TP_EC_VOLUME_MAX = 14, 6434 }; 6435 6436 enum tpacpi_volume_access_mode { 6437 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6438 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6439 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6440 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6441 TPACPI_VOL_MODE_MAX 6442 }; 6443 6444 enum tpacpi_volume_capabilities { 6445 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6446 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6447 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6448 TPACPI_VOL_CAP_MAX 6449 }; 6450 6451 static enum tpacpi_volume_access_mode volume_mode = 6452 TPACPI_VOL_MODE_MAX; 6453 6454 static enum tpacpi_volume_capabilities volume_capabilities; 6455 static bool volume_control_allowed; 6456 6457 /* 6458 * Used to syncronize writers to TP_EC_AUDIO and 6459 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6460 */ 6461 static struct mutex volume_mutex; 6462 6463 static void tpacpi_volume_checkpoint_nvram(void) 6464 { 6465 u8 lec = 0; 6466 u8 b_nvram; 6467 u8 ec_mask; 6468 6469 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6470 return; 6471 if (!volume_control_allowed) 6472 return; 6473 6474 vdbg_printk(TPACPI_DBG_MIXER, 6475 "trying to checkpoint mixer state to NVRAM...\n"); 6476 6477 if (tp_features.mixer_no_level_control) 6478 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6479 else 6480 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6481 6482 if (mutex_lock_killable(&volume_mutex) < 0) 6483 return; 6484 6485 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6486 goto unlock; 6487 lec &= ec_mask; 6488 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6489 6490 if (lec != (b_nvram & ec_mask)) { 6491 /* NVRAM needs update */ 6492 b_nvram &= ~ec_mask; 6493 b_nvram |= lec; 6494 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6495 dbg_printk(TPACPI_DBG_MIXER, 6496 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6497 (unsigned int) lec, (unsigned int) b_nvram); 6498 } else { 6499 vdbg_printk(TPACPI_DBG_MIXER, 6500 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6501 (unsigned int) lec, (unsigned int) b_nvram); 6502 } 6503 6504 unlock: 6505 mutex_unlock(&volume_mutex); 6506 } 6507 6508 static int volume_get_status_ec(u8 *status) 6509 { 6510 u8 s; 6511 6512 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6513 return -EIO; 6514 6515 *status = s; 6516 6517 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6518 6519 return 0; 6520 } 6521 6522 static int volume_get_status(u8 *status) 6523 { 6524 return volume_get_status_ec(status); 6525 } 6526 6527 static int volume_set_status_ec(const u8 status) 6528 { 6529 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6530 return -EIO; 6531 6532 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6533 6534 return 0; 6535 } 6536 6537 static int volume_set_status(const u8 status) 6538 { 6539 return volume_set_status_ec(status); 6540 } 6541 6542 /* returns < 0 on error, 0 on no change, 1 on change */ 6543 static int __volume_set_mute_ec(const bool mute) 6544 { 6545 int rc; 6546 u8 s, n; 6547 6548 if (mutex_lock_killable(&volume_mutex) < 0) 6549 return -EINTR; 6550 6551 rc = volume_get_status_ec(&s); 6552 if (rc) 6553 goto unlock; 6554 6555 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6556 s & ~TP_EC_AUDIO_MUTESW_MSK; 6557 6558 if (n != s) { 6559 rc = volume_set_status_ec(n); 6560 if (!rc) 6561 rc = 1; 6562 } 6563 6564 unlock: 6565 mutex_unlock(&volume_mutex); 6566 return rc; 6567 } 6568 6569 static int volume_alsa_set_mute(const bool mute) 6570 { 6571 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6572 (mute) ? "" : "un"); 6573 return __volume_set_mute_ec(mute); 6574 } 6575 6576 static int volume_set_mute(const bool mute) 6577 { 6578 int rc; 6579 6580 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6581 (mute) ? "" : "un"); 6582 6583 rc = __volume_set_mute_ec(mute); 6584 return (rc < 0) ? rc : 0; 6585 } 6586 6587 /* returns < 0 on error, 0 on no change, 1 on change */ 6588 static int __volume_set_volume_ec(const u8 vol) 6589 { 6590 int rc; 6591 u8 s, n; 6592 6593 if (vol > TP_EC_VOLUME_MAX) 6594 return -EINVAL; 6595 6596 if (mutex_lock_killable(&volume_mutex) < 0) 6597 return -EINTR; 6598 6599 rc = volume_get_status_ec(&s); 6600 if (rc) 6601 goto unlock; 6602 6603 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6604 6605 if (n != s) { 6606 rc = volume_set_status_ec(n); 6607 if (!rc) 6608 rc = 1; 6609 } 6610 6611 unlock: 6612 mutex_unlock(&volume_mutex); 6613 return rc; 6614 } 6615 6616 static int volume_alsa_set_volume(const u8 vol) 6617 { 6618 dbg_printk(TPACPI_DBG_MIXER, 6619 "ALSA: trying to set volume level to %hu\n", vol); 6620 return __volume_set_volume_ec(vol); 6621 } 6622 6623 static void volume_alsa_notify_change(void) 6624 { 6625 struct tpacpi_alsa_data *d; 6626 6627 if (alsa_card && alsa_card->private_data) { 6628 d = alsa_card->private_data; 6629 if (d->ctl_mute_id) 6630 snd_ctl_notify(alsa_card, 6631 SNDRV_CTL_EVENT_MASK_VALUE, 6632 d->ctl_mute_id); 6633 if (d->ctl_vol_id) 6634 snd_ctl_notify(alsa_card, 6635 SNDRV_CTL_EVENT_MASK_VALUE, 6636 d->ctl_vol_id); 6637 } 6638 } 6639 6640 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6641 struct snd_ctl_elem_info *uinfo) 6642 { 6643 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6644 uinfo->count = 1; 6645 uinfo->value.integer.min = 0; 6646 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6647 return 0; 6648 } 6649 6650 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6651 struct snd_ctl_elem_value *ucontrol) 6652 { 6653 u8 s; 6654 int rc; 6655 6656 rc = volume_get_status(&s); 6657 if (rc < 0) 6658 return rc; 6659 6660 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6661 return 0; 6662 } 6663 6664 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6665 struct snd_ctl_elem_value *ucontrol) 6666 { 6667 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6668 ucontrol->value.integer.value[0]); 6669 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6670 } 6671 6672 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6673 6674 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6675 struct snd_ctl_elem_value *ucontrol) 6676 { 6677 u8 s; 6678 int rc; 6679 6680 rc = volume_get_status(&s); 6681 if (rc < 0) 6682 return rc; 6683 6684 ucontrol->value.integer.value[0] = 6685 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6686 return 0; 6687 } 6688 6689 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6690 struct snd_ctl_elem_value *ucontrol) 6691 { 6692 tpacpi_disclose_usertask("ALSA", "%smute\n", 6693 ucontrol->value.integer.value[0] ? 6694 "un" : ""); 6695 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6696 } 6697 6698 static struct snd_kcontrol_new volume_alsa_control_vol = { 6699 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6700 .name = "Console Playback Volume", 6701 .index = 0, 6702 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6703 .info = volume_alsa_vol_info, 6704 .get = volume_alsa_vol_get, 6705 }; 6706 6707 static struct snd_kcontrol_new volume_alsa_control_mute = { 6708 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6709 .name = "Console Playback Switch", 6710 .index = 0, 6711 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6712 .info = volume_alsa_mute_info, 6713 .get = volume_alsa_mute_get, 6714 }; 6715 6716 static void volume_suspend(void) 6717 { 6718 tpacpi_volume_checkpoint_nvram(); 6719 } 6720 6721 static void volume_resume(void) 6722 { 6723 volume_alsa_notify_change(); 6724 } 6725 6726 static void volume_shutdown(void) 6727 { 6728 tpacpi_volume_checkpoint_nvram(); 6729 } 6730 6731 static void volume_exit(void) 6732 { 6733 if (alsa_card) { 6734 snd_card_free(alsa_card); 6735 alsa_card = NULL; 6736 } 6737 6738 tpacpi_volume_checkpoint_nvram(); 6739 } 6740 6741 static int __init volume_create_alsa_mixer(void) 6742 { 6743 struct snd_card *card; 6744 struct tpacpi_alsa_data *data; 6745 struct snd_kcontrol *ctl_vol; 6746 struct snd_kcontrol *ctl_mute; 6747 int rc; 6748 6749 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE, 6750 sizeof(struct tpacpi_alsa_data), &card); 6751 if (rc < 0 || !card) { 6752 pr_err("Failed to create ALSA card structures: %d\n", rc); 6753 return 1; 6754 } 6755 6756 BUG_ON(!card->private_data); 6757 data = card->private_data; 6758 data->card = card; 6759 6760 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6761 sizeof(card->driver)); 6762 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6763 sizeof(card->shortname)); 6764 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6765 (thinkpad_id.ec_version_str) ? 6766 thinkpad_id.ec_version_str : "(unknown)"); 6767 snprintf(card->longname, sizeof(card->longname), 6768 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6769 (thinkpad_id.ec_version_str) ? 6770 thinkpad_id.ec_version_str : "unknown"); 6771 6772 if (volume_control_allowed) { 6773 volume_alsa_control_vol.put = volume_alsa_vol_put; 6774 volume_alsa_control_vol.access = 6775 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6776 6777 volume_alsa_control_mute.put = volume_alsa_mute_put; 6778 volume_alsa_control_mute.access = 6779 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6780 } 6781 6782 if (!tp_features.mixer_no_level_control) { 6783 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6784 rc = snd_ctl_add(card, ctl_vol); 6785 if (rc < 0) { 6786 pr_err("Failed to create ALSA volume control: %d\n", 6787 rc); 6788 goto err_exit; 6789 } 6790 data->ctl_vol_id = &ctl_vol->id; 6791 } 6792 6793 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6794 rc = snd_ctl_add(card, ctl_mute); 6795 if (rc < 0) { 6796 pr_err("Failed to create ALSA mute control: %d\n", rc); 6797 goto err_exit; 6798 } 6799 data->ctl_mute_id = &ctl_mute->id; 6800 6801 snd_card_set_dev(card, &tpacpi_pdev->dev); 6802 rc = snd_card_register(card); 6803 if (rc < 0) { 6804 pr_err("Failed to register ALSA card: %d\n", rc); 6805 goto err_exit; 6806 } 6807 6808 alsa_card = card; 6809 return 0; 6810 6811 err_exit: 6812 snd_card_free(card); 6813 return 1; 6814 } 6815 6816 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6817 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6818 6819 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6820 /* Whitelist volume level on all IBM by default */ 6821 { .vendor = PCI_VENDOR_ID_IBM, 6822 .bios = TPACPI_MATCH_ANY, 6823 .ec = TPACPI_MATCH_ANY, 6824 .quirks = TPACPI_VOL_Q_LEVEL }, 6825 6826 /* Lenovo models with volume control (needs confirmation) */ 6827 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6828 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6829 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6830 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6831 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6832 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6833 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6834 6835 /* Whitelist mute-only on all Lenovo by default */ 6836 { .vendor = PCI_VENDOR_ID_LENOVO, 6837 .bios = TPACPI_MATCH_ANY, 6838 .ec = TPACPI_MATCH_ANY, 6839 .quirks = TPACPI_VOL_Q_MUTEONLY } 6840 }; 6841 6842 static int __init volume_init(struct ibm_init_struct *iibm) 6843 { 6844 unsigned long quirks; 6845 int rc; 6846 6847 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 6848 6849 mutex_init(&volume_mutex); 6850 6851 /* 6852 * Check for module parameter bogosity, note that we 6853 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 6854 * able to detect "unspecified" 6855 */ 6856 if (volume_mode > TPACPI_VOL_MODE_MAX) 6857 return -EINVAL; 6858 6859 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 6860 pr_err("UCMS step volume mode not implemented, " 6861 "please contact %s\n", TPACPI_MAIL); 6862 return 1; 6863 } 6864 6865 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 6866 return -EINVAL; 6867 6868 /* 6869 * The ALSA mixer is our primary interface. 6870 * When disabled, don't install the subdriver at all 6871 */ 6872 if (!alsa_enable) { 6873 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6874 "ALSA mixer disabled by parameter, " 6875 "not loading volume subdriver...\n"); 6876 return 1; 6877 } 6878 6879 quirks = tpacpi_check_quirks(volume_quirk_table, 6880 ARRAY_SIZE(volume_quirk_table)); 6881 6882 switch (volume_capabilities) { 6883 case TPACPI_VOL_CAP_AUTO: 6884 if (quirks & TPACPI_VOL_Q_MUTEONLY) 6885 tp_features.mixer_no_level_control = 1; 6886 else if (quirks & TPACPI_VOL_Q_LEVEL) 6887 tp_features.mixer_no_level_control = 0; 6888 else 6889 return 1; /* no mixer */ 6890 break; 6891 case TPACPI_VOL_CAP_VOLMUTE: 6892 tp_features.mixer_no_level_control = 0; 6893 break; 6894 case TPACPI_VOL_CAP_MUTEONLY: 6895 tp_features.mixer_no_level_control = 1; 6896 break; 6897 default: 6898 return 1; 6899 } 6900 6901 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 6902 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6903 "using user-supplied volume_capabilities=%d\n", 6904 volume_capabilities); 6905 6906 if (volume_mode == TPACPI_VOL_MODE_AUTO || 6907 volume_mode == TPACPI_VOL_MODE_MAX) { 6908 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 6909 6910 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6911 "driver auto-selected volume_mode=%d\n", 6912 volume_mode); 6913 } else { 6914 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6915 "using user-supplied volume_mode=%d\n", 6916 volume_mode); 6917 } 6918 6919 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6920 "mute is supported, volume control is %s\n", 6921 str_supported(!tp_features.mixer_no_level_control)); 6922 6923 rc = volume_create_alsa_mixer(); 6924 if (rc) { 6925 pr_err("Could not create the ALSA mixer interface\n"); 6926 return rc; 6927 } 6928 6929 pr_info("Console audio control enabled, mode: %s\n", 6930 (volume_control_allowed) ? 6931 "override (read/write)" : 6932 "monitor (read only)"); 6933 6934 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6935 "registering volume hotkeys as change notification\n"); 6936 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6937 | TP_ACPI_HKEY_VOLUP_MASK 6938 | TP_ACPI_HKEY_VOLDWN_MASK 6939 | TP_ACPI_HKEY_MUTE_MASK); 6940 6941 return 0; 6942 } 6943 6944 static int volume_read(struct seq_file *m) 6945 { 6946 u8 status; 6947 6948 if (volume_get_status(&status) < 0) { 6949 seq_printf(m, "level:\t\tunreadable\n"); 6950 } else { 6951 if (tp_features.mixer_no_level_control) 6952 seq_printf(m, "level:\t\tunsupported\n"); 6953 else 6954 seq_printf(m, "level:\t\t%d\n", 6955 status & TP_EC_AUDIO_LVL_MSK); 6956 6957 seq_printf(m, "mute:\t\t%s\n", 6958 onoff(status, TP_EC_AUDIO_MUTESW)); 6959 6960 if (volume_control_allowed) { 6961 seq_printf(m, "commands:\tunmute, mute\n"); 6962 if (!tp_features.mixer_no_level_control) { 6963 seq_printf(m, 6964 "commands:\tup, down\n"); 6965 seq_printf(m, 6966 "commands:\tlevel <level>" 6967 " (<level> is 0-%d)\n", 6968 TP_EC_VOLUME_MAX); 6969 } 6970 } 6971 } 6972 6973 return 0; 6974 } 6975 6976 static int volume_write(char *buf) 6977 { 6978 u8 s; 6979 u8 new_level, new_mute; 6980 int l; 6981 char *cmd; 6982 int rc; 6983 6984 /* 6985 * We do allow volume control at driver startup, so that the 6986 * user can set initial state through the volume=... parameter hack. 6987 */ 6988 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 6989 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 6990 tp_warned.volume_ctrl_forbidden = 1; 6991 pr_notice("Console audio control in monitor mode, " 6992 "changes are not allowed\n"); 6993 pr_notice("Use the volume_control=1 module parameter " 6994 "to enable volume control\n"); 6995 } 6996 return -EPERM; 6997 } 6998 6999 rc = volume_get_status(&s); 7000 if (rc < 0) 7001 return rc; 7002 7003 new_level = s & TP_EC_AUDIO_LVL_MSK; 7004 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7005 7006 while ((cmd = next_cmd(&buf))) { 7007 if (!tp_features.mixer_no_level_control) { 7008 if (strlencmp(cmd, "up") == 0) { 7009 if (new_mute) 7010 new_mute = 0; 7011 else if (new_level < TP_EC_VOLUME_MAX) 7012 new_level++; 7013 continue; 7014 } else if (strlencmp(cmd, "down") == 0) { 7015 if (new_mute) 7016 new_mute = 0; 7017 else if (new_level > 0) 7018 new_level--; 7019 continue; 7020 } else if (sscanf(cmd, "level %u", &l) == 1 && 7021 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7022 new_level = l; 7023 continue; 7024 } 7025 } 7026 if (strlencmp(cmd, "mute") == 0) 7027 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7028 else if (strlencmp(cmd, "unmute") == 0) 7029 new_mute = 0; 7030 else 7031 return -EINVAL; 7032 } 7033 7034 if (tp_features.mixer_no_level_control) { 7035 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7036 new_mute ? "" : "un"); 7037 rc = volume_set_mute(!!new_mute); 7038 } else { 7039 tpacpi_disclose_usertask("procfs volume", 7040 "%smute and set level to %d\n", 7041 new_mute ? "" : "un", new_level); 7042 rc = volume_set_status(new_mute | new_level); 7043 } 7044 volume_alsa_notify_change(); 7045 7046 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7047 } 7048 7049 static struct ibm_struct volume_driver_data = { 7050 .name = "volume", 7051 .read = volume_read, 7052 .write = volume_write, 7053 .exit = volume_exit, 7054 .suspend = volume_suspend, 7055 .resume = volume_resume, 7056 .shutdown = volume_shutdown, 7057 }; 7058 7059 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7060 7061 #define alsa_card NULL 7062 7063 static void inline volume_alsa_notify_change(void) 7064 { 7065 } 7066 7067 static int __init volume_init(struct ibm_init_struct *iibm) 7068 { 7069 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7070 7071 return 1; 7072 } 7073 7074 static struct ibm_struct volume_driver_data = { 7075 .name = "volume", 7076 }; 7077 7078 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7079 7080 /************************************************************************* 7081 * Fan subdriver 7082 */ 7083 7084 /* 7085 * FAN ACCESS MODES 7086 * 7087 * TPACPI_FAN_RD_ACPI_GFAN: 7088 * ACPI GFAN method: returns fan level 7089 * 7090 * see TPACPI_FAN_WR_ACPI_SFAN 7091 * EC 0x2f (HFSP) not available if GFAN exists 7092 * 7093 * TPACPI_FAN_WR_ACPI_SFAN: 7094 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7095 * 7096 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7097 * it for writing. 7098 * 7099 * TPACPI_FAN_WR_TPEC: 7100 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7101 * Supported on almost all ThinkPads 7102 * 7103 * Fan speed changes of any sort (including those caused by the 7104 * disengaged mode) are usually done slowly by the firmware as the 7105 * maximum amount of fan duty cycle change per second seems to be 7106 * limited. 7107 * 7108 * Reading is not available if GFAN exists. 7109 * Writing is not available if SFAN exists. 7110 * 7111 * Bits 7112 * 7 automatic mode engaged; 7113 * (default operation mode of the ThinkPad) 7114 * fan level is ignored in this mode. 7115 * 6 full speed mode (takes precedence over bit 7); 7116 * not available on all thinkpads. May disable 7117 * the tachometer while the fan controller ramps up 7118 * the speed (which can take up to a few *minutes*). 7119 * Speeds up fan to 100% duty-cycle, which is far above 7120 * the standard RPM levels. It is not impossible that 7121 * it could cause hardware damage. 7122 * 5-3 unused in some models. Extra bits for fan level 7123 * in others, but still useless as all values above 7124 * 7 map to the same speed as level 7 in these models. 7125 * 2-0 fan level (0..7 usually) 7126 * 0x00 = stop 7127 * 0x07 = max (set when temperatures critical) 7128 * Some ThinkPads may have other levels, see 7129 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7130 * 7131 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7132 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7133 * does so, its initial value is meaningless (0x07). 7134 * 7135 * For firmware bugs, refer to: 7136 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7137 * 7138 * ---- 7139 * 7140 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7141 * Main fan tachometer reading (in RPM) 7142 * 7143 * This register is present on all ThinkPads with a new-style EC, and 7144 * it is known not to be present on the A21m/e, and T22, as there is 7145 * something else in offset 0x84 according to the ACPI DSDT. Other 7146 * ThinkPads from this same time period (and earlier) probably lack the 7147 * tachometer as well. 7148 * 7149 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7150 * was never fixed by IBM to report the EC firmware version string 7151 * probably support the tachometer (like the early X models), so 7152 * detecting it is quite hard. We need more data to know for sure. 7153 * 7154 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7155 * might result. 7156 * 7157 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7158 * mode. 7159 * 7160 * For firmware bugs, refer to: 7161 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7162 * 7163 * ---- 7164 * 7165 * ThinkPad EC register 0x31 bit 0 (only on select models) 7166 * 7167 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7168 * show the speed of the main fan. When bit 0 of EC register 0x31 7169 * is one, the tachometer registers show the speed of the auxiliary 7170 * fan. 7171 * 7172 * Fan control seems to affect both fans, regardless of the state 7173 * of this bit. 7174 * 7175 * So far, only the firmware for the X60/X61 non-tablet versions 7176 * seem to support this (firmware TP-7M). 7177 * 7178 * TPACPI_FAN_WR_ACPI_FANS: 7179 * ThinkPad X31, X40, X41. Not available in the X60. 7180 * 7181 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7182 * high speed. ACPI DSDT seems to map these three speeds to levels 7183 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7184 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7185 * 7186 * The speeds are stored on handles 7187 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7188 * 7189 * There are three default speed sets, accessible as handles: 7190 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7191 * 7192 * ACPI DSDT switches which set is in use depending on various 7193 * factors. 7194 * 7195 * TPACPI_FAN_WR_TPEC is also available and should be used to 7196 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7197 * but the ACPI tables just mention level 7. 7198 */ 7199 7200 enum { /* Fan control constants */ 7201 fan_status_offset = 0x2f, /* EC register 0x2f */ 7202 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7203 * 0x84 must be read before 0x85 */ 7204 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7205 bit 0 selects which fan is active */ 7206 7207 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7208 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7209 7210 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7211 }; 7212 7213 enum fan_status_access_mode { 7214 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7215 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7216 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7217 }; 7218 7219 enum fan_control_access_mode { 7220 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7221 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7222 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7223 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7224 }; 7225 7226 enum fan_control_commands { 7227 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7228 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7229 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7230 * and also watchdog cmd */ 7231 }; 7232 7233 static bool fan_control_allowed; 7234 7235 static enum fan_status_access_mode fan_status_access_mode; 7236 static enum fan_control_access_mode fan_control_access_mode; 7237 static enum fan_control_commands fan_control_commands; 7238 7239 static u8 fan_control_initial_status; 7240 static u8 fan_control_desired_level; 7241 static u8 fan_control_resume_level; 7242 static int fan_watchdog_maxinterval; 7243 7244 static struct mutex fan_mutex; 7245 7246 static void fan_watchdog_fire(struct work_struct *ignored); 7247 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7248 7249 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7250 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7251 "\\FSPD", /* 600e/x, 770e, 770x */ 7252 ); /* all others */ 7253 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7254 "JFNS", /* 770x-JL */ 7255 ); /* all others */ 7256 7257 /* 7258 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7259 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7260 * be in auto mode (0x80). 7261 * 7262 * This is corrected by any write to HFSP either by the driver, or 7263 * by the firmware. 7264 * 7265 * We assume 0x07 really means auto mode while this quirk is active, 7266 * as this is far more likely than the ThinkPad being in level 7, 7267 * which is only used by the firmware during thermal emergencies. 7268 * 7269 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7270 * TP-70 (T43, R52), which are known to be buggy. 7271 */ 7272 7273 static void fan_quirk1_setup(void) 7274 { 7275 if (fan_control_initial_status == 0x07) { 7276 pr_notice("fan_init: initial fan status is unknown, " 7277 "assuming it is in auto mode\n"); 7278 tp_features.fan_ctrl_status_undef = 1; 7279 } 7280 } 7281 7282 static void fan_quirk1_handle(u8 *fan_status) 7283 { 7284 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7285 if (*fan_status != fan_control_initial_status) { 7286 /* something changed the HFSP regisnter since 7287 * driver init time, so it is not undefined 7288 * anymore */ 7289 tp_features.fan_ctrl_status_undef = 0; 7290 } else { 7291 /* Return most likely status. In fact, it 7292 * might be the only possible status */ 7293 *fan_status = TP_EC_FAN_AUTO; 7294 } 7295 } 7296 } 7297 7298 /* Select main fan on X60/X61, NOOP on others */ 7299 static bool fan_select_fan1(void) 7300 { 7301 if (tp_features.second_fan) { 7302 u8 val; 7303 7304 if (ec_read(fan_select_offset, &val) < 0) 7305 return false; 7306 val &= 0xFEU; 7307 if (ec_write(fan_select_offset, val) < 0) 7308 return false; 7309 } 7310 return true; 7311 } 7312 7313 /* Select secondary fan on X60/X61 */ 7314 static bool fan_select_fan2(void) 7315 { 7316 u8 val; 7317 7318 if (!tp_features.second_fan) 7319 return false; 7320 7321 if (ec_read(fan_select_offset, &val) < 0) 7322 return false; 7323 val |= 0x01U; 7324 if (ec_write(fan_select_offset, val) < 0) 7325 return false; 7326 7327 return true; 7328 } 7329 7330 /* 7331 * Call with fan_mutex held 7332 */ 7333 static void fan_update_desired_level(u8 status) 7334 { 7335 if ((status & 7336 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7337 if (status > 7) 7338 fan_control_desired_level = 7; 7339 else 7340 fan_control_desired_level = status; 7341 } 7342 } 7343 7344 static int fan_get_status(u8 *status) 7345 { 7346 u8 s; 7347 7348 /* TODO: 7349 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7350 7351 switch (fan_status_access_mode) { 7352 case TPACPI_FAN_RD_ACPI_GFAN: { 7353 /* 570, 600e/x, 770e, 770x */ 7354 int res; 7355 7356 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 7357 return -EIO; 7358 7359 if (likely(status)) 7360 *status = res & 0x07; 7361 7362 break; 7363 } 7364 case TPACPI_FAN_RD_TPEC: 7365 /* all except 570, 600e/x, 770e, 770x */ 7366 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7367 return -EIO; 7368 7369 if (likely(status)) { 7370 *status = s; 7371 fan_quirk1_handle(status); 7372 } 7373 7374 break; 7375 7376 default: 7377 return -ENXIO; 7378 } 7379 7380 return 0; 7381 } 7382 7383 static int fan_get_status_safe(u8 *status) 7384 { 7385 int rc; 7386 u8 s; 7387 7388 if (mutex_lock_killable(&fan_mutex)) 7389 return -ERESTARTSYS; 7390 rc = fan_get_status(&s); 7391 if (!rc) 7392 fan_update_desired_level(s); 7393 mutex_unlock(&fan_mutex); 7394 7395 if (status) 7396 *status = s; 7397 7398 return rc; 7399 } 7400 7401 static int fan_get_speed(unsigned int *speed) 7402 { 7403 u8 hi, lo; 7404 7405 switch (fan_status_access_mode) { 7406 case TPACPI_FAN_RD_TPEC: 7407 /* all except 570, 600e/x, 770e, 770x */ 7408 if (unlikely(!fan_select_fan1())) 7409 return -EIO; 7410 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7411 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7412 return -EIO; 7413 7414 if (likely(speed)) 7415 *speed = (hi << 8) | lo; 7416 7417 break; 7418 7419 default: 7420 return -ENXIO; 7421 } 7422 7423 return 0; 7424 } 7425 7426 static int fan2_get_speed(unsigned int *speed) 7427 { 7428 u8 hi, lo; 7429 bool rc; 7430 7431 switch (fan_status_access_mode) { 7432 case TPACPI_FAN_RD_TPEC: 7433 /* all except 570, 600e/x, 770e, 770x */ 7434 if (unlikely(!fan_select_fan2())) 7435 return -EIO; 7436 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7437 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7438 fan_select_fan1(); /* play it safe */ 7439 if (rc) 7440 return -EIO; 7441 7442 if (likely(speed)) 7443 *speed = (hi << 8) | lo; 7444 7445 break; 7446 7447 default: 7448 return -ENXIO; 7449 } 7450 7451 return 0; 7452 } 7453 7454 static int fan_set_level(int level) 7455 { 7456 if (!fan_control_allowed) 7457 return -EPERM; 7458 7459 switch (fan_control_access_mode) { 7460 case TPACPI_FAN_WR_ACPI_SFAN: 7461 if (level >= 0 && level <= 7) { 7462 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7463 return -EIO; 7464 } else 7465 return -EINVAL; 7466 break; 7467 7468 case TPACPI_FAN_WR_ACPI_FANS: 7469 case TPACPI_FAN_WR_TPEC: 7470 if (!(level & TP_EC_FAN_AUTO) && 7471 !(level & TP_EC_FAN_FULLSPEED) && 7472 ((level < 0) || (level > 7))) 7473 return -EINVAL; 7474 7475 /* safety net should the EC not support AUTO 7476 * or FULLSPEED mode bits and just ignore them */ 7477 if (level & TP_EC_FAN_FULLSPEED) 7478 level |= 7; /* safety min speed 7 */ 7479 else if (level & TP_EC_FAN_AUTO) 7480 level |= 4; /* safety min speed 4 */ 7481 7482 if (!acpi_ec_write(fan_status_offset, level)) 7483 return -EIO; 7484 else 7485 tp_features.fan_ctrl_status_undef = 0; 7486 break; 7487 7488 default: 7489 return -ENXIO; 7490 } 7491 7492 vdbg_printk(TPACPI_DBG_FAN, 7493 "fan control: set fan control register to 0x%02x\n", level); 7494 return 0; 7495 } 7496 7497 static int fan_set_level_safe(int level) 7498 { 7499 int rc; 7500 7501 if (!fan_control_allowed) 7502 return -EPERM; 7503 7504 if (mutex_lock_killable(&fan_mutex)) 7505 return -ERESTARTSYS; 7506 7507 if (level == TPACPI_FAN_LAST_LEVEL) 7508 level = fan_control_desired_level; 7509 7510 rc = fan_set_level(level); 7511 if (!rc) 7512 fan_update_desired_level(level); 7513 7514 mutex_unlock(&fan_mutex); 7515 return rc; 7516 } 7517 7518 static int fan_set_enable(void) 7519 { 7520 u8 s; 7521 int rc; 7522 7523 if (!fan_control_allowed) 7524 return -EPERM; 7525 7526 if (mutex_lock_killable(&fan_mutex)) 7527 return -ERESTARTSYS; 7528 7529 switch (fan_control_access_mode) { 7530 case TPACPI_FAN_WR_ACPI_FANS: 7531 case TPACPI_FAN_WR_TPEC: 7532 rc = fan_get_status(&s); 7533 if (rc < 0) 7534 break; 7535 7536 /* Don't go out of emergency fan mode */ 7537 if (s != 7) { 7538 s &= 0x07; 7539 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7540 } 7541 7542 if (!acpi_ec_write(fan_status_offset, s)) 7543 rc = -EIO; 7544 else { 7545 tp_features.fan_ctrl_status_undef = 0; 7546 rc = 0; 7547 } 7548 break; 7549 7550 case TPACPI_FAN_WR_ACPI_SFAN: 7551 rc = fan_get_status(&s); 7552 if (rc < 0) 7553 break; 7554 7555 s &= 0x07; 7556 7557 /* Set fan to at least level 4 */ 7558 s |= 4; 7559 7560 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7561 rc = -EIO; 7562 else 7563 rc = 0; 7564 break; 7565 7566 default: 7567 rc = -ENXIO; 7568 } 7569 7570 mutex_unlock(&fan_mutex); 7571 7572 if (!rc) 7573 vdbg_printk(TPACPI_DBG_FAN, 7574 "fan control: set fan control register to 0x%02x\n", 7575 s); 7576 return rc; 7577 } 7578 7579 static int fan_set_disable(void) 7580 { 7581 int rc; 7582 7583 if (!fan_control_allowed) 7584 return -EPERM; 7585 7586 if (mutex_lock_killable(&fan_mutex)) 7587 return -ERESTARTSYS; 7588 7589 rc = 0; 7590 switch (fan_control_access_mode) { 7591 case TPACPI_FAN_WR_ACPI_FANS: 7592 case TPACPI_FAN_WR_TPEC: 7593 if (!acpi_ec_write(fan_status_offset, 0x00)) 7594 rc = -EIO; 7595 else { 7596 fan_control_desired_level = 0; 7597 tp_features.fan_ctrl_status_undef = 0; 7598 } 7599 break; 7600 7601 case TPACPI_FAN_WR_ACPI_SFAN: 7602 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7603 rc = -EIO; 7604 else 7605 fan_control_desired_level = 0; 7606 break; 7607 7608 default: 7609 rc = -ENXIO; 7610 } 7611 7612 if (!rc) 7613 vdbg_printk(TPACPI_DBG_FAN, 7614 "fan control: set fan control register to 0\n"); 7615 7616 mutex_unlock(&fan_mutex); 7617 return rc; 7618 } 7619 7620 static int fan_set_speed(int speed) 7621 { 7622 int rc; 7623 7624 if (!fan_control_allowed) 7625 return -EPERM; 7626 7627 if (mutex_lock_killable(&fan_mutex)) 7628 return -ERESTARTSYS; 7629 7630 rc = 0; 7631 switch (fan_control_access_mode) { 7632 case TPACPI_FAN_WR_ACPI_FANS: 7633 if (speed >= 0 && speed <= 65535) { 7634 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7635 speed, speed, speed)) 7636 rc = -EIO; 7637 } else 7638 rc = -EINVAL; 7639 break; 7640 7641 default: 7642 rc = -ENXIO; 7643 } 7644 7645 mutex_unlock(&fan_mutex); 7646 return rc; 7647 } 7648 7649 static void fan_watchdog_reset(void) 7650 { 7651 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7652 return; 7653 7654 if (fan_watchdog_maxinterval > 0 && 7655 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 7656 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 7657 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 7658 else 7659 cancel_delayed_work(&fan_watchdog_task); 7660 } 7661 7662 static void fan_watchdog_fire(struct work_struct *ignored) 7663 { 7664 int rc; 7665 7666 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7667 return; 7668 7669 pr_notice("fan watchdog: enabling fan\n"); 7670 rc = fan_set_enable(); 7671 if (rc < 0) { 7672 pr_err("fan watchdog: error %d while enabling fan, " 7673 "will try again later...\n", -rc); 7674 /* reschedule for later */ 7675 fan_watchdog_reset(); 7676 } 7677 } 7678 7679 /* 7680 * SYSFS fan layout: hwmon compatible (device) 7681 * 7682 * pwm*_enable: 7683 * 0: "disengaged" mode 7684 * 1: manual mode 7685 * 2: native EC "auto" mode (recommended, hardware default) 7686 * 7687 * pwm*: set speed in manual mode, ignored otherwise. 7688 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7689 * interpolation. 7690 * 7691 * fan*_input: tachometer reading, RPM 7692 * 7693 * 7694 * SYSFS fan layout: extensions 7695 * 7696 * fan_watchdog (driver): 7697 * fan watchdog interval in seconds, 0 disables (default), max 120 7698 */ 7699 7700 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7701 static ssize_t fan_pwm1_enable_show(struct device *dev, 7702 struct device_attribute *attr, 7703 char *buf) 7704 { 7705 int res, mode; 7706 u8 status; 7707 7708 res = fan_get_status_safe(&status); 7709 if (res) 7710 return res; 7711 7712 if (status & TP_EC_FAN_FULLSPEED) { 7713 mode = 0; 7714 } else if (status & TP_EC_FAN_AUTO) { 7715 mode = 2; 7716 } else 7717 mode = 1; 7718 7719 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7720 } 7721 7722 static ssize_t fan_pwm1_enable_store(struct device *dev, 7723 struct device_attribute *attr, 7724 const char *buf, size_t count) 7725 { 7726 unsigned long t; 7727 int res, level; 7728 7729 if (parse_strtoul(buf, 2, &t)) 7730 return -EINVAL; 7731 7732 tpacpi_disclose_usertask("hwmon pwm1_enable", 7733 "set fan mode to %lu\n", t); 7734 7735 switch (t) { 7736 case 0: 7737 level = TP_EC_FAN_FULLSPEED; 7738 break; 7739 case 1: 7740 level = TPACPI_FAN_LAST_LEVEL; 7741 break; 7742 case 2: 7743 level = TP_EC_FAN_AUTO; 7744 break; 7745 case 3: 7746 /* reserved for software-controlled auto mode */ 7747 return -ENOSYS; 7748 default: 7749 return -EINVAL; 7750 } 7751 7752 res = fan_set_level_safe(level); 7753 if (res == -ENXIO) 7754 return -EINVAL; 7755 else if (res < 0) 7756 return res; 7757 7758 fan_watchdog_reset(); 7759 7760 return count; 7761 } 7762 7763 static struct device_attribute dev_attr_fan_pwm1_enable = 7764 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7765 fan_pwm1_enable_show, fan_pwm1_enable_store); 7766 7767 /* sysfs fan pwm1 ------------------------------------------------------ */ 7768 static ssize_t fan_pwm1_show(struct device *dev, 7769 struct device_attribute *attr, 7770 char *buf) 7771 { 7772 int res; 7773 u8 status; 7774 7775 res = fan_get_status_safe(&status); 7776 if (res) 7777 return res; 7778 7779 if ((status & 7780 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7781 status = fan_control_desired_level; 7782 7783 if (status > 7) 7784 status = 7; 7785 7786 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7787 } 7788 7789 static ssize_t fan_pwm1_store(struct device *dev, 7790 struct device_attribute *attr, 7791 const char *buf, size_t count) 7792 { 7793 unsigned long s; 7794 int rc; 7795 u8 status, newlevel; 7796 7797 if (parse_strtoul(buf, 255, &s)) 7798 return -EINVAL; 7799 7800 tpacpi_disclose_usertask("hwmon pwm1", 7801 "set fan speed to %lu\n", s); 7802 7803 /* scale down from 0-255 to 0-7 */ 7804 newlevel = (s >> 5) & 0x07; 7805 7806 if (mutex_lock_killable(&fan_mutex)) 7807 return -ERESTARTSYS; 7808 7809 rc = fan_get_status(&status); 7810 if (!rc && (status & 7811 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7812 rc = fan_set_level(newlevel); 7813 if (rc == -ENXIO) 7814 rc = -EINVAL; 7815 else if (!rc) { 7816 fan_update_desired_level(newlevel); 7817 fan_watchdog_reset(); 7818 } 7819 } 7820 7821 mutex_unlock(&fan_mutex); 7822 return (rc)? rc : count; 7823 } 7824 7825 static struct device_attribute dev_attr_fan_pwm1 = 7826 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7827 fan_pwm1_show, fan_pwm1_store); 7828 7829 /* sysfs fan fan1_input ------------------------------------------------ */ 7830 static ssize_t fan_fan1_input_show(struct device *dev, 7831 struct device_attribute *attr, 7832 char *buf) 7833 { 7834 int res; 7835 unsigned int speed; 7836 7837 res = fan_get_speed(&speed); 7838 if (res < 0) 7839 return res; 7840 7841 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7842 } 7843 7844 static struct device_attribute dev_attr_fan_fan1_input = 7845 __ATTR(fan1_input, S_IRUGO, 7846 fan_fan1_input_show, NULL); 7847 7848 /* sysfs fan fan2_input ------------------------------------------------ */ 7849 static ssize_t fan_fan2_input_show(struct device *dev, 7850 struct device_attribute *attr, 7851 char *buf) 7852 { 7853 int res; 7854 unsigned int speed; 7855 7856 res = fan2_get_speed(&speed); 7857 if (res < 0) 7858 return res; 7859 7860 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7861 } 7862 7863 static struct device_attribute dev_attr_fan_fan2_input = 7864 __ATTR(fan2_input, S_IRUGO, 7865 fan_fan2_input_show, NULL); 7866 7867 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7868 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7869 char *buf) 7870 { 7871 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7872 } 7873 7874 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7875 const char *buf, size_t count) 7876 { 7877 unsigned long t; 7878 7879 if (parse_strtoul(buf, 120, &t)) 7880 return -EINVAL; 7881 7882 if (!fan_control_allowed) 7883 return -EPERM; 7884 7885 fan_watchdog_maxinterval = t; 7886 fan_watchdog_reset(); 7887 7888 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7889 7890 return count; 7891 } 7892 7893 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7894 fan_fan_watchdog_show, fan_fan_watchdog_store); 7895 7896 /* --------------------------------------------------------------------- */ 7897 static struct attribute *fan_attributes[] = { 7898 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7899 &dev_attr_fan_fan1_input.attr, 7900 NULL, /* for fan2_input */ 7901 NULL 7902 }; 7903 7904 static const struct attribute_group fan_attr_group = { 7905 .attrs = fan_attributes, 7906 }; 7907 7908 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7909 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7910 7911 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7912 { .vendor = PCI_VENDOR_ID_IBM, \ 7913 .bios = TPACPI_MATCH_ANY, \ 7914 .ec = TPID(__id1, __id2), \ 7915 .quirks = __quirks } 7916 7917 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7918 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7919 .bios = TPACPI_MATCH_ANY, \ 7920 .ec = TPID(__id1, __id2), \ 7921 .quirks = __quirks } 7922 7923 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7924 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7925 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 7926 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 7927 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 7928 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 7929 }; 7930 7931 #undef TPACPI_FAN_QL 7932 #undef TPACPI_FAN_QI 7933 7934 static int __init fan_init(struct ibm_init_struct *iibm) 7935 { 7936 int rc; 7937 unsigned long quirks; 7938 7939 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7940 "initializing fan subdriver\n"); 7941 7942 mutex_init(&fan_mutex); 7943 fan_status_access_mode = TPACPI_FAN_NONE; 7944 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7945 fan_control_commands = 0; 7946 fan_watchdog_maxinterval = 0; 7947 tp_features.fan_ctrl_status_undef = 0; 7948 tp_features.second_fan = 0; 7949 fan_control_desired_level = 7; 7950 7951 if (tpacpi_is_ibm()) { 7952 TPACPI_ACPIHANDLE_INIT(fans); 7953 TPACPI_ACPIHANDLE_INIT(gfan); 7954 TPACPI_ACPIHANDLE_INIT(sfan); 7955 } 7956 7957 quirks = tpacpi_check_quirks(fan_quirk_table, 7958 ARRAY_SIZE(fan_quirk_table)); 7959 7960 if (gfan_handle) { 7961 /* 570, 600e/x, 770e, 770x */ 7962 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 7963 } else { 7964 /* all other ThinkPads: note that even old-style 7965 * ThinkPad ECs supports the fan control register */ 7966 if (likely(acpi_ec_read(fan_status_offset, 7967 &fan_control_initial_status))) { 7968 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 7969 if (quirks & TPACPI_FAN_Q1) 7970 fan_quirk1_setup(); 7971 if (quirks & TPACPI_FAN_2FAN) { 7972 tp_features.second_fan = 1; 7973 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7974 "secondary fan support enabled\n"); 7975 } 7976 } else { 7977 pr_err("ThinkPad ACPI EC access misbehaving, " 7978 "fan status and control unavailable\n"); 7979 return 1; 7980 } 7981 } 7982 7983 if (sfan_handle) { 7984 /* 570, 770x-JL */ 7985 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 7986 fan_control_commands |= 7987 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 7988 } else { 7989 if (!gfan_handle) { 7990 /* gfan without sfan means no fan control */ 7991 /* all other models implement TP EC 0x2f control */ 7992 7993 if (fans_handle) { 7994 /* X31, X40, X41 */ 7995 fan_control_access_mode = 7996 TPACPI_FAN_WR_ACPI_FANS; 7997 fan_control_commands |= 7998 TPACPI_FAN_CMD_SPEED | 7999 TPACPI_FAN_CMD_LEVEL | 8000 TPACPI_FAN_CMD_ENABLE; 8001 } else { 8002 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8003 fan_control_commands |= 8004 TPACPI_FAN_CMD_LEVEL | 8005 TPACPI_FAN_CMD_ENABLE; 8006 } 8007 } 8008 } 8009 8010 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8011 "fan is %s, modes %d, %d\n", 8012 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8013 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8014 fan_status_access_mode, fan_control_access_mode); 8015 8016 /* fan control master switch */ 8017 if (!fan_control_allowed) { 8018 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8019 fan_control_commands = 0; 8020 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8021 "fan control features disabled by parameter\n"); 8022 } 8023 8024 /* update fan_control_desired_level */ 8025 if (fan_status_access_mode != TPACPI_FAN_NONE) 8026 fan_get_status_safe(NULL); 8027 8028 if (fan_status_access_mode != TPACPI_FAN_NONE || 8029 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8030 if (tp_features.second_fan) { 8031 /* attach second fan tachometer */ 8032 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8033 &dev_attr_fan_fan2_input.attr; 8034 } 8035 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8036 &fan_attr_group); 8037 if (rc < 0) 8038 return rc; 8039 8040 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8041 &driver_attr_fan_watchdog); 8042 if (rc < 0) { 8043 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8044 &fan_attr_group); 8045 return rc; 8046 } 8047 return 0; 8048 } else 8049 return 1; 8050 } 8051 8052 static void fan_exit(void) 8053 { 8054 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8055 "cancelling any pending fan watchdog tasks\n"); 8056 8057 /* FIXME: can we really do this unconditionally? */ 8058 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8059 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8060 &driver_attr_fan_watchdog); 8061 8062 cancel_delayed_work(&fan_watchdog_task); 8063 flush_workqueue(tpacpi_wq); 8064 } 8065 8066 static void fan_suspend(void) 8067 { 8068 int rc; 8069 8070 if (!fan_control_allowed) 8071 return; 8072 8073 /* Store fan status in cache */ 8074 fan_control_resume_level = 0; 8075 rc = fan_get_status_safe(&fan_control_resume_level); 8076 if (rc < 0) 8077 pr_notice("failed to read fan level for later " 8078 "restore during resume: %d\n", rc); 8079 8080 /* if it is undefined, don't attempt to restore it. 8081 * KEEP THIS LAST */ 8082 if (tp_features.fan_ctrl_status_undef) 8083 fan_control_resume_level = 0; 8084 } 8085 8086 static void fan_resume(void) 8087 { 8088 u8 current_level = 7; 8089 bool do_set = false; 8090 int rc; 8091 8092 /* DSDT *always* updates status on resume */ 8093 tp_features.fan_ctrl_status_undef = 0; 8094 8095 if (!fan_control_allowed || 8096 !fan_control_resume_level || 8097 (fan_get_status_safe(¤t_level) < 0)) 8098 return; 8099 8100 switch (fan_control_access_mode) { 8101 case TPACPI_FAN_WR_ACPI_SFAN: 8102 /* never decrease fan level */ 8103 do_set = (fan_control_resume_level > current_level); 8104 break; 8105 case TPACPI_FAN_WR_ACPI_FANS: 8106 case TPACPI_FAN_WR_TPEC: 8107 /* never decrease fan level, scale is: 8108 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8109 * 8110 * We expect the firmware to set either 7 or AUTO, but we 8111 * handle FULLSPEED out of paranoia. 8112 * 8113 * So, we can safely only restore FULLSPEED or 7, anything 8114 * else could slow the fan. Restoring AUTO is useless, at 8115 * best that's exactly what the DSDT already set (it is the 8116 * slower it uses). 8117 * 8118 * Always keep in mind that the DSDT *will* have set the 8119 * fans to what the vendor supposes is the best level. We 8120 * muck with it only to speed the fan up. 8121 */ 8122 if (fan_control_resume_level != 7 && 8123 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8124 return; 8125 else 8126 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8127 (current_level != fan_control_resume_level); 8128 break; 8129 default: 8130 return; 8131 } 8132 if (do_set) { 8133 pr_notice("restoring fan level to 0x%02x\n", 8134 fan_control_resume_level); 8135 rc = fan_set_level_safe(fan_control_resume_level); 8136 if (rc < 0) 8137 pr_notice("failed to restore fan level: %d\n", rc); 8138 } 8139 } 8140 8141 static int fan_read(struct seq_file *m) 8142 { 8143 int rc; 8144 u8 status; 8145 unsigned int speed = 0; 8146 8147 switch (fan_status_access_mode) { 8148 case TPACPI_FAN_RD_ACPI_GFAN: 8149 /* 570, 600e/x, 770e, 770x */ 8150 rc = fan_get_status_safe(&status); 8151 if (rc < 0) 8152 return rc; 8153 8154 seq_printf(m, "status:\t\t%s\n" 8155 "level:\t\t%d\n", 8156 (status != 0) ? "enabled" : "disabled", status); 8157 break; 8158 8159 case TPACPI_FAN_RD_TPEC: 8160 /* all except 570, 600e/x, 770e, 770x */ 8161 rc = fan_get_status_safe(&status); 8162 if (rc < 0) 8163 return rc; 8164 8165 seq_printf(m, "status:\t\t%s\n", 8166 (status != 0) ? "enabled" : "disabled"); 8167 8168 rc = fan_get_speed(&speed); 8169 if (rc < 0) 8170 return rc; 8171 8172 seq_printf(m, "speed:\t\t%d\n", speed); 8173 8174 if (status & TP_EC_FAN_FULLSPEED) 8175 /* Disengaged mode takes precedence */ 8176 seq_printf(m, "level:\t\tdisengaged\n"); 8177 else if (status & TP_EC_FAN_AUTO) 8178 seq_printf(m, "level:\t\tauto\n"); 8179 else 8180 seq_printf(m, "level:\t\t%d\n", status); 8181 break; 8182 8183 case TPACPI_FAN_NONE: 8184 default: 8185 seq_printf(m, "status:\t\tnot supported\n"); 8186 } 8187 8188 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8189 seq_printf(m, "commands:\tlevel <level>"); 8190 8191 switch (fan_control_access_mode) { 8192 case TPACPI_FAN_WR_ACPI_SFAN: 8193 seq_printf(m, " (<level> is 0-7)\n"); 8194 break; 8195 8196 default: 8197 seq_printf(m, " (<level> is 0-7, " 8198 "auto, disengaged, full-speed)\n"); 8199 break; 8200 } 8201 } 8202 8203 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8204 seq_printf(m, "commands:\tenable, disable\n" 8205 "commands:\twatchdog <timeout> (<timeout> " 8206 "is 0 (off), 1-120 (seconds))\n"); 8207 8208 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8209 seq_printf(m, "commands:\tspeed <speed>" 8210 " (<speed> is 0-65535)\n"); 8211 8212 return 0; 8213 } 8214 8215 static int fan_write_cmd_level(const char *cmd, int *rc) 8216 { 8217 int level; 8218 8219 if (strlencmp(cmd, "level auto") == 0) 8220 level = TP_EC_FAN_AUTO; 8221 else if ((strlencmp(cmd, "level disengaged") == 0) | 8222 (strlencmp(cmd, "level full-speed") == 0)) 8223 level = TP_EC_FAN_FULLSPEED; 8224 else if (sscanf(cmd, "level %d", &level) != 1) 8225 return 0; 8226 8227 *rc = fan_set_level_safe(level); 8228 if (*rc == -ENXIO) 8229 pr_err("level command accepted for unsupported access mode %d\n", 8230 fan_control_access_mode); 8231 else if (!*rc) 8232 tpacpi_disclose_usertask("procfs fan", 8233 "set level to %d\n", level); 8234 8235 return 1; 8236 } 8237 8238 static int fan_write_cmd_enable(const char *cmd, int *rc) 8239 { 8240 if (strlencmp(cmd, "enable") != 0) 8241 return 0; 8242 8243 *rc = fan_set_enable(); 8244 if (*rc == -ENXIO) 8245 pr_err("enable command accepted for unsupported access mode %d\n", 8246 fan_control_access_mode); 8247 else if (!*rc) 8248 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8249 8250 return 1; 8251 } 8252 8253 static int fan_write_cmd_disable(const char *cmd, int *rc) 8254 { 8255 if (strlencmp(cmd, "disable") != 0) 8256 return 0; 8257 8258 *rc = fan_set_disable(); 8259 if (*rc == -ENXIO) 8260 pr_err("disable command accepted for unsupported access mode %d\n", 8261 fan_control_access_mode); 8262 else if (!*rc) 8263 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8264 8265 return 1; 8266 } 8267 8268 static int fan_write_cmd_speed(const char *cmd, int *rc) 8269 { 8270 int speed; 8271 8272 /* TODO: 8273 * Support speed <low> <medium> <high> ? */ 8274 8275 if (sscanf(cmd, "speed %d", &speed) != 1) 8276 return 0; 8277 8278 *rc = fan_set_speed(speed); 8279 if (*rc == -ENXIO) 8280 pr_err("speed command accepted for unsupported access mode %d\n", 8281 fan_control_access_mode); 8282 else if (!*rc) 8283 tpacpi_disclose_usertask("procfs fan", 8284 "set speed to %d\n", speed); 8285 8286 return 1; 8287 } 8288 8289 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8290 { 8291 int interval; 8292 8293 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8294 return 0; 8295 8296 if (interval < 0 || interval > 120) 8297 *rc = -EINVAL; 8298 else { 8299 fan_watchdog_maxinterval = interval; 8300 tpacpi_disclose_usertask("procfs fan", 8301 "set watchdog timer to %d\n", 8302 interval); 8303 } 8304 8305 return 1; 8306 } 8307 8308 static int fan_write(char *buf) 8309 { 8310 char *cmd; 8311 int rc = 0; 8312 8313 while (!rc && (cmd = next_cmd(&buf))) { 8314 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8315 fan_write_cmd_level(cmd, &rc)) && 8316 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8317 (fan_write_cmd_enable(cmd, &rc) || 8318 fan_write_cmd_disable(cmd, &rc) || 8319 fan_write_cmd_watchdog(cmd, &rc))) && 8320 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8321 fan_write_cmd_speed(cmd, &rc)) 8322 ) 8323 rc = -EINVAL; 8324 else if (!rc) 8325 fan_watchdog_reset(); 8326 } 8327 8328 return rc; 8329 } 8330 8331 static struct ibm_struct fan_driver_data = { 8332 .name = "fan", 8333 .read = fan_read, 8334 .write = fan_write, 8335 .exit = fan_exit, 8336 .suspend = fan_suspend, 8337 .resume = fan_resume, 8338 }; 8339 8340 /**************************************************************************** 8341 **************************************************************************** 8342 * 8343 * Infrastructure 8344 * 8345 **************************************************************************** 8346 ****************************************************************************/ 8347 8348 /* 8349 * HKEY event callout for other subdrivers go here 8350 * (yes, it is ugly, but it is quick, safe, and gets the job done 8351 */ 8352 static void tpacpi_driver_event(const unsigned int hkey_event) 8353 { 8354 if (ibm_backlight_device) { 8355 switch (hkey_event) { 8356 case TP_HKEY_EV_BRGHT_UP: 8357 case TP_HKEY_EV_BRGHT_DOWN: 8358 tpacpi_brightness_notify_change(); 8359 } 8360 } 8361 if (alsa_card) { 8362 switch (hkey_event) { 8363 case TP_HKEY_EV_VOL_UP: 8364 case TP_HKEY_EV_VOL_DOWN: 8365 case TP_HKEY_EV_VOL_MUTE: 8366 volume_alsa_notify_change(); 8367 } 8368 } 8369 } 8370 8371 static void hotkey_driver_event(const unsigned int scancode) 8372 { 8373 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8374 } 8375 8376 /* sysfs name ---------------------------------------------------------- */ 8377 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8378 struct device_attribute *attr, 8379 char *buf) 8380 { 8381 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8382 } 8383 8384 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8385 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8386 8387 /* --------------------------------------------------------------------- */ 8388 8389 /* /proc support */ 8390 static struct proc_dir_entry *proc_dir; 8391 8392 /* 8393 * Module and infrastructure proble, init and exit handling 8394 */ 8395 8396 static bool force_load; 8397 8398 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8399 static const char * __init str_supported(int is_supported) 8400 { 8401 static char text_unsupported[] __initdata = "not supported"; 8402 8403 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8404 } 8405 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8406 8407 static void ibm_exit(struct ibm_struct *ibm) 8408 { 8409 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8410 8411 list_del_init(&ibm->all_drivers); 8412 8413 if (ibm->flags.acpi_notify_installed) { 8414 dbg_printk(TPACPI_DBG_EXIT, 8415 "%s: acpi_remove_notify_handler\n", ibm->name); 8416 BUG_ON(!ibm->acpi); 8417 acpi_remove_notify_handler(*ibm->acpi->handle, 8418 ibm->acpi->type, 8419 dispatch_acpi_notify); 8420 ibm->flags.acpi_notify_installed = 0; 8421 } 8422 8423 if (ibm->flags.proc_created) { 8424 dbg_printk(TPACPI_DBG_EXIT, 8425 "%s: remove_proc_entry\n", ibm->name); 8426 remove_proc_entry(ibm->name, proc_dir); 8427 ibm->flags.proc_created = 0; 8428 } 8429 8430 if (ibm->flags.acpi_driver_registered) { 8431 dbg_printk(TPACPI_DBG_EXIT, 8432 "%s: acpi_bus_unregister_driver\n", ibm->name); 8433 BUG_ON(!ibm->acpi); 8434 acpi_bus_unregister_driver(ibm->acpi->driver); 8435 kfree(ibm->acpi->driver); 8436 ibm->acpi->driver = NULL; 8437 ibm->flags.acpi_driver_registered = 0; 8438 } 8439 8440 if (ibm->flags.init_called && ibm->exit) { 8441 ibm->exit(); 8442 ibm->flags.init_called = 0; 8443 } 8444 8445 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8446 } 8447 8448 static int __init ibm_init(struct ibm_init_struct *iibm) 8449 { 8450 int ret; 8451 struct ibm_struct *ibm = iibm->data; 8452 struct proc_dir_entry *entry; 8453 8454 BUG_ON(ibm == NULL); 8455 8456 INIT_LIST_HEAD(&ibm->all_drivers); 8457 8458 if (ibm->flags.experimental && !experimental) 8459 return 0; 8460 8461 dbg_printk(TPACPI_DBG_INIT, 8462 "probing for %s\n", ibm->name); 8463 8464 if (iibm->init) { 8465 ret = iibm->init(iibm); 8466 if (ret > 0) 8467 return 0; /* probe failed */ 8468 if (ret) 8469 return ret; 8470 8471 ibm->flags.init_called = 1; 8472 } 8473 8474 if (ibm->acpi) { 8475 if (ibm->acpi->hid) { 8476 ret = register_tpacpi_subdriver(ibm); 8477 if (ret) 8478 goto err_out; 8479 } 8480 8481 if (ibm->acpi->notify) { 8482 ret = setup_acpi_notify(ibm); 8483 if (ret == -ENODEV) { 8484 pr_notice("disabling subdriver %s\n", 8485 ibm->name); 8486 ret = 0; 8487 goto err_out; 8488 } 8489 if (ret < 0) 8490 goto err_out; 8491 } 8492 } 8493 8494 dbg_printk(TPACPI_DBG_INIT, 8495 "%s installed\n", ibm->name); 8496 8497 if (ibm->read) { 8498 umode_t mode = iibm->base_procfs_mode; 8499 8500 if (!mode) 8501 mode = S_IRUGO; 8502 if (ibm->write) 8503 mode |= S_IWUSR; 8504 entry = proc_create_data(ibm->name, mode, proc_dir, 8505 &dispatch_proc_fops, ibm); 8506 if (!entry) { 8507 pr_err("unable to create proc entry %s\n", ibm->name); 8508 ret = -ENODEV; 8509 goto err_out; 8510 } 8511 ibm->flags.proc_created = 1; 8512 } 8513 8514 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8515 8516 return 0; 8517 8518 err_out: 8519 dbg_printk(TPACPI_DBG_INIT, 8520 "%s: at error exit path with result %d\n", 8521 ibm->name, ret); 8522 8523 ibm_exit(ibm); 8524 return (ret < 0)? ret : 0; 8525 } 8526 8527 /* Probing */ 8528 8529 static bool __pure __init tpacpi_is_fw_digit(const char c) 8530 { 8531 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8532 } 8533 8534 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8535 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8536 const char t) 8537 { 8538 return s && strlen(s) >= 8 && 8539 tpacpi_is_fw_digit(s[0]) && 8540 tpacpi_is_fw_digit(s[1]) && 8541 s[2] == t && 8542 (s[3] == 'T' || s[3] == 'N') && 8543 tpacpi_is_fw_digit(s[4]) && 8544 tpacpi_is_fw_digit(s[5]); 8545 } 8546 8547 /* returns 0 - probe ok, or < 0 - probe error. 8548 * Probe ok doesn't mean thinkpad found. 8549 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8550 static int __must_check __init get_thinkpad_model_data( 8551 struct thinkpad_id_data *tp) 8552 { 8553 const struct dmi_device *dev = NULL; 8554 char ec_fw_string[18]; 8555 char const *s; 8556 8557 if (!tp) 8558 return -EINVAL; 8559 8560 memset(tp, 0, sizeof(*tp)); 8561 8562 if (dmi_name_in_vendors("IBM")) 8563 tp->vendor = PCI_VENDOR_ID_IBM; 8564 else if (dmi_name_in_vendors("LENOVO")) 8565 tp->vendor = PCI_VENDOR_ID_LENOVO; 8566 else 8567 return 0; 8568 8569 s = dmi_get_system_info(DMI_BIOS_VERSION); 8570 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8571 if (s && !tp->bios_version_str) 8572 return -ENOMEM; 8573 8574 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8575 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 8576 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 8577 return 0; 8578 8579 tp->bios_model = tp->bios_version_str[0] 8580 | (tp->bios_version_str[1] << 8); 8581 tp->bios_release = (tp->bios_version_str[4] << 8) 8582 | tp->bios_version_str[5]; 8583 8584 /* 8585 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8586 * X32 or newer, all Z series; Some models must have an 8587 * up-to-date BIOS or they will not be detected. 8588 * 8589 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8590 */ 8591 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8592 if (sscanf(dev->name, 8593 "IBM ThinkPad Embedded Controller -[%17c", 8594 ec_fw_string) == 1) { 8595 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8596 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8597 8598 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8599 if (!tp->ec_version_str) 8600 return -ENOMEM; 8601 8602 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8603 tp->ec_model = ec_fw_string[0] 8604 | (ec_fw_string[1] << 8); 8605 tp->ec_release = (ec_fw_string[4] << 8) 8606 | ec_fw_string[5]; 8607 } else { 8608 pr_notice("ThinkPad firmware release %s " 8609 "doesn't match the known patterns\n", 8610 ec_fw_string); 8611 pr_notice("please report this to %s\n", 8612 TPACPI_MAIL); 8613 } 8614 break; 8615 } 8616 } 8617 8618 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8619 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) { 8620 tp->model_str = kstrdup(s, GFP_KERNEL); 8621 if (!tp->model_str) 8622 return -ENOMEM; 8623 } else { 8624 s = dmi_get_system_info(DMI_BIOS_VENDOR); 8625 if (s && !(strnicmp(s, "Lenovo", 6))) { 8626 tp->model_str = kstrdup(s, GFP_KERNEL); 8627 if (!tp->model_str) 8628 return -ENOMEM; 8629 } 8630 } 8631 8632 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8633 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8634 if (s && !tp->nummodel_str) 8635 return -ENOMEM; 8636 8637 return 0; 8638 } 8639 8640 static int __init probe_for_thinkpad(void) 8641 { 8642 int is_thinkpad; 8643 8644 if (acpi_disabled) 8645 return -ENODEV; 8646 8647 /* It would be dangerous to run the driver in this case */ 8648 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8649 return -ENODEV; 8650 8651 /* 8652 * Non-ancient models have better DMI tagging, but very old models 8653 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8654 */ 8655 is_thinkpad = (thinkpad_id.model_str != NULL) || 8656 (thinkpad_id.ec_model != 0) || 8657 tpacpi_is_fw_known(); 8658 8659 /* The EC handler is required */ 8660 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8661 if (!ec_handle) { 8662 if (is_thinkpad) 8663 pr_err("Not yet supported ThinkPad detected!\n"); 8664 return -ENODEV; 8665 } 8666 8667 if (!is_thinkpad && !force_load) 8668 return -ENODEV; 8669 8670 return 0; 8671 } 8672 8673 static void __init thinkpad_acpi_init_banner(void) 8674 { 8675 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8676 pr_info("%s\n", TPACPI_URL); 8677 8678 pr_info("ThinkPad BIOS %s, EC %s\n", 8679 (thinkpad_id.bios_version_str) ? 8680 thinkpad_id.bios_version_str : "unknown", 8681 (thinkpad_id.ec_version_str) ? 8682 thinkpad_id.ec_version_str : "unknown"); 8683 8684 BUG_ON(!thinkpad_id.vendor); 8685 8686 if (thinkpad_id.model_str) 8687 pr_info("%s %s, model %s\n", 8688 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8689 "IBM" : ((thinkpad_id.vendor == 8690 PCI_VENDOR_ID_LENOVO) ? 8691 "Lenovo" : "Unknown vendor"), 8692 thinkpad_id.model_str, 8693 (thinkpad_id.nummodel_str) ? 8694 thinkpad_id.nummodel_str : "unknown"); 8695 } 8696 8697 /* Module init, exit, parameters */ 8698 8699 static struct ibm_init_struct ibms_init[] __initdata = { 8700 { 8701 .data = &thinkpad_acpi_driver_data, 8702 }, 8703 { 8704 .init = hotkey_init, 8705 .data = &hotkey_driver_data, 8706 }, 8707 { 8708 .init = bluetooth_init, 8709 .data = &bluetooth_driver_data, 8710 }, 8711 { 8712 .init = wan_init, 8713 .data = &wan_driver_data, 8714 }, 8715 { 8716 .init = uwb_init, 8717 .data = &uwb_driver_data, 8718 }, 8719 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8720 { 8721 .init = video_init, 8722 .base_procfs_mode = S_IRUSR, 8723 .data = &video_driver_data, 8724 }, 8725 #endif 8726 { 8727 .init = light_init, 8728 .data = &light_driver_data, 8729 }, 8730 { 8731 .init = cmos_init, 8732 .data = &cmos_driver_data, 8733 }, 8734 { 8735 .init = led_init, 8736 .data = &led_driver_data, 8737 }, 8738 { 8739 .init = beep_init, 8740 .data = &beep_driver_data, 8741 }, 8742 { 8743 .init = thermal_init, 8744 .data = &thermal_driver_data, 8745 }, 8746 { 8747 .init = brightness_init, 8748 .data = &brightness_driver_data, 8749 }, 8750 { 8751 .init = volume_init, 8752 .data = &volume_driver_data, 8753 }, 8754 { 8755 .init = fan_init, 8756 .data = &fan_driver_data, 8757 }, 8758 }; 8759 8760 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8761 { 8762 unsigned int i; 8763 struct ibm_struct *ibm; 8764 8765 if (!kp || !kp->name || !val) 8766 return -EINVAL; 8767 8768 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8769 ibm = ibms_init[i].data; 8770 WARN_ON(ibm == NULL); 8771 8772 if (!ibm || !ibm->name) 8773 continue; 8774 8775 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8776 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8777 return -ENOSPC; 8778 strcpy(ibms_init[i].param, val); 8779 strcat(ibms_init[i].param, ","); 8780 return 0; 8781 } 8782 } 8783 8784 return -EINVAL; 8785 } 8786 8787 module_param(experimental, int, 0444); 8788 MODULE_PARM_DESC(experimental, 8789 "Enables experimental features when non-zero"); 8790 8791 module_param_named(debug, dbg_level, uint, 0); 8792 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8793 8794 module_param(force_load, bool, 0444); 8795 MODULE_PARM_DESC(force_load, 8796 "Attempts to load the driver even on a " 8797 "mis-identified ThinkPad when true"); 8798 8799 module_param_named(fan_control, fan_control_allowed, bool, 0444); 8800 MODULE_PARM_DESC(fan_control, 8801 "Enables setting fan parameters features when true"); 8802 8803 module_param_named(brightness_mode, brightness_mode, uint, 0444); 8804 MODULE_PARM_DESC(brightness_mode, 8805 "Selects brightness control strategy: " 8806 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8807 8808 module_param(brightness_enable, uint, 0444); 8809 MODULE_PARM_DESC(brightness_enable, 8810 "Enables backlight control when 1, disables when 0"); 8811 8812 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 8813 module_param_named(volume_mode, volume_mode, uint, 0444); 8814 MODULE_PARM_DESC(volume_mode, 8815 "Selects volume control strategy: " 8816 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 8817 8818 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 8819 MODULE_PARM_DESC(volume_capabilities, 8820 "Selects the mixer capabilites: " 8821 "0=auto, 1=volume and mute, 2=mute only"); 8822 8823 module_param_named(volume_control, volume_control_allowed, bool, 0444); 8824 MODULE_PARM_DESC(volume_control, 8825 "Enables software override for the console audio " 8826 "control when true"); 8827 8828 /* ALSA module API parameters */ 8829 module_param_named(index, alsa_index, int, 0444); 8830 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 8831 module_param_named(id, alsa_id, charp, 0444); 8832 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 8833 module_param_named(enable, alsa_enable, bool, 0444); 8834 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 8835 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 8836 8837 #define TPACPI_PARAM(feature) \ 8838 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8839 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8840 "at module load, see documentation") 8841 8842 TPACPI_PARAM(hotkey); 8843 TPACPI_PARAM(bluetooth); 8844 TPACPI_PARAM(video); 8845 TPACPI_PARAM(light); 8846 TPACPI_PARAM(cmos); 8847 TPACPI_PARAM(led); 8848 TPACPI_PARAM(beep); 8849 TPACPI_PARAM(brightness); 8850 TPACPI_PARAM(volume); 8851 TPACPI_PARAM(fan); 8852 8853 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8854 module_param(dbg_wlswemul, uint, 0444); 8855 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8856 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8857 MODULE_PARM_DESC(wlsw_state, 8858 "Initial state of the emulated WLSW switch"); 8859 8860 module_param(dbg_bluetoothemul, uint, 0444); 8861 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8862 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8863 MODULE_PARM_DESC(bluetooth_state, 8864 "Initial state of the emulated bluetooth switch"); 8865 8866 module_param(dbg_wwanemul, uint, 0444); 8867 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8868 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8869 MODULE_PARM_DESC(wwan_state, 8870 "Initial state of the emulated WWAN switch"); 8871 8872 module_param(dbg_uwbemul, uint, 0444); 8873 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8874 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8875 MODULE_PARM_DESC(uwb_state, 8876 "Initial state of the emulated UWB switch"); 8877 #endif 8878 8879 static void thinkpad_acpi_module_exit(void) 8880 { 8881 struct ibm_struct *ibm, *itmp; 8882 8883 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8884 8885 list_for_each_entry_safe_reverse(ibm, itmp, 8886 &tpacpi_all_drivers, 8887 all_drivers) { 8888 ibm_exit(ibm); 8889 } 8890 8891 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8892 8893 if (tpacpi_inputdev) { 8894 if (tp_features.input_device_registered) 8895 input_unregister_device(tpacpi_inputdev); 8896 else 8897 input_free_device(tpacpi_inputdev); 8898 kfree(hotkey_keycode_map); 8899 } 8900 8901 if (tpacpi_hwmon) 8902 hwmon_device_unregister(tpacpi_hwmon); 8903 8904 if (tp_features.sensors_pdev_attrs_registered) 8905 device_remove_file(&tpacpi_sensors_pdev->dev, 8906 &dev_attr_thinkpad_acpi_pdev_name); 8907 if (tpacpi_sensors_pdev) 8908 platform_device_unregister(tpacpi_sensors_pdev); 8909 if (tpacpi_pdev) 8910 platform_device_unregister(tpacpi_pdev); 8911 8912 if (tp_features.sensors_pdrv_attrs_registered) 8913 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8914 if (tp_features.platform_drv_attrs_registered) 8915 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8916 8917 if (tp_features.sensors_pdrv_registered) 8918 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8919 8920 if (tp_features.platform_drv_registered) 8921 platform_driver_unregister(&tpacpi_pdriver); 8922 8923 if (proc_dir) 8924 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 8925 8926 if (tpacpi_wq) 8927 destroy_workqueue(tpacpi_wq); 8928 8929 kfree(thinkpad_id.bios_version_str); 8930 kfree(thinkpad_id.ec_version_str); 8931 kfree(thinkpad_id.model_str); 8932 kfree(thinkpad_id.nummodel_str); 8933 } 8934 8935 8936 static int __init thinkpad_acpi_module_init(void) 8937 { 8938 int ret, i; 8939 8940 tpacpi_lifecycle = TPACPI_LIFE_INIT; 8941 8942 /* Driver-level probe */ 8943 8944 ret = get_thinkpad_model_data(&thinkpad_id); 8945 if (ret) { 8946 pr_err("unable to get DMI data: %d\n", ret); 8947 thinkpad_acpi_module_exit(); 8948 return ret; 8949 } 8950 ret = probe_for_thinkpad(); 8951 if (ret) { 8952 thinkpad_acpi_module_exit(); 8953 return ret; 8954 } 8955 8956 /* Driver initialization */ 8957 8958 thinkpad_acpi_init_banner(); 8959 tpacpi_check_outdated_fw(); 8960 8961 TPACPI_ACPIHANDLE_INIT(ecrd); 8962 TPACPI_ACPIHANDLE_INIT(ecwr); 8963 8964 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 8965 if (!tpacpi_wq) { 8966 thinkpad_acpi_module_exit(); 8967 return -ENOMEM; 8968 } 8969 8970 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 8971 if (!proc_dir) { 8972 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 8973 thinkpad_acpi_module_exit(); 8974 return -ENODEV; 8975 } 8976 8977 ret = platform_driver_register(&tpacpi_pdriver); 8978 if (ret) { 8979 pr_err("unable to register main platform driver\n"); 8980 thinkpad_acpi_module_exit(); 8981 return ret; 8982 } 8983 tp_features.platform_drv_registered = 1; 8984 8985 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 8986 if (ret) { 8987 pr_err("unable to register hwmon platform driver\n"); 8988 thinkpad_acpi_module_exit(); 8989 return ret; 8990 } 8991 tp_features.sensors_pdrv_registered = 1; 8992 8993 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 8994 if (!ret) { 8995 tp_features.platform_drv_attrs_registered = 1; 8996 ret = tpacpi_create_driver_attributes( 8997 &tpacpi_hwmon_pdriver.driver); 8998 } 8999 if (ret) { 9000 pr_err("unable to create sysfs driver attributes\n"); 9001 thinkpad_acpi_module_exit(); 9002 return ret; 9003 } 9004 tp_features.sensors_pdrv_attrs_registered = 1; 9005 9006 9007 /* Device initialization */ 9008 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9009 NULL, 0); 9010 if (IS_ERR(tpacpi_pdev)) { 9011 ret = PTR_ERR(tpacpi_pdev); 9012 tpacpi_pdev = NULL; 9013 pr_err("unable to register platform device\n"); 9014 thinkpad_acpi_module_exit(); 9015 return ret; 9016 } 9017 tpacpi_sensors_pdev = platform_device_register_simple( 9018 TPACPI_HWMON_DRVR_NAME, 9019 -1, NULL, 0); 9020 if (IS_ERR(tpacpi_sensors_pdev)) { 9021 ret = PTR_ERR(tpacpi_sensors_pdev); 9022 tpacpi_sensors_pdev = NULL; 9023 pr_err("unable to register hwmon platform device\n"); 9024 thinkpad_acpi_module_exit(); 9025 return ret; 9026 } 9027 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9028 &dev_attr_thinkpad_acpi_pdev_name); 9029 if (ret) { 9030 pr_err("unable to create sysfs hwmon device attributes\n"); 9031 thinkpad_acpi_module_exit(); 9032 return ret; 9033 } 9034 tp_features.sensors_pdev_attrs_registered = 1; 9035 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9036 if (IS_ERR(tpacpi_hwmon)) { 9037 ret = PTR_ERR(tpacpi_hwmon); 9038 tpacpi_hwmon = NULL; 9039 pr_err("unable to register hwmon device\n"); 9040 thinkpad_acpi_module_exit(); 9041 return ret; 9042 } 9043 mutex_init(&tpacpi_inputdev_send_mutex); 9044 tpacpi_inputdev = input_allocate_device(); 9045 if (!tpacpi_inputdev) { 9046 pr_err("unable to allocate input device\n"); 9047 thinkpad_acpi_module_exit(); 9048 return -ENOMEM; 9049 } else { 9050 /* Prepare input device, but don't register */ 9051 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9052 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9053 tpacpi_inputdev->id.bustype = BUS_HOST; 9054 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9055 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9056 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9057 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9058 } 9059 9060 /* Init subdriver dependencies */ 9061 tpacpi_detect_brightness_capabilities(); 9062 9063 /* Init subdrivers */ 9064 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9065 ret = ibm_init(&ibms_init[i]); 9066 if (ret >= 0 && *ibms_init[i].param) 9067 ret = ibms_init[i].data->write(ibms_init[i].param); 9068 if (ret < 0) { 9069 thinkpad_acpi_module_exit(); 9070 return ret; 9071 } 9072 } 9073 9074 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9075 9076 ret = input_register_device(tpacpi_inputdev); 9077 if (ret < 0) { 9078 pr_err("unable to register input device\n"); 9079 thinkpad_acpi_module_exit(); 9080 return ret; 9081 } else { 9082 tp_features.input_device_registered = 1; 9083 } 9084 9085 return 0; 9086 } 9087 9088 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9089 9090 /* 9091 * This will autoload the driver in almost every ThinkPad 9092 * in widespread use. 9093 * 9094 * Only _VERY_ old models, like the 240, 240x and 570 lack 9095 * the HKEY event interface. 9096 */ 9097 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9098 9099 /* 9100 * DMI matching for module autoloading 9101 * 9102 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9103 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9104 * 9105 * Only models listed in thinkwiki will be supported, so add yours 9106 * if it is not there yet. 9107 */ 9108 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9109 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9110 9111 /* Ancient thinkpad BIOSes have to be identified by 9112 * BIOS type or model number, and there are far less 9113 * BIOS types than model numbers... */ 9114 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9115 9116 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9117 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9118 MODULE_DESCRIPTION(TPACPI_DESC); 9119 MODULE_VERSION(TPACPI_VERSION); 9120 MODULE_LICENSE("GPL"); 9121 9122 module_init(thinkpad_acpi_module_init); 9123 module_exit(thinkpad_acpi_module_exit); 9124